1 Corinthians 16:10 describes Timothy 'doing the work of the Lord' — the very labor Paul calls believers to abound in.

In 1 Corinthians 3:8, Paul notes each worker receives wages according to labor, directly linking to the promise that labor in the Lord is not vain.

In 1 Corinthians 16:13, Paul echoes the call to 'stand firm' — another exhortation to steadfastness and strength in the faith.

Titus 2:14 says Christ redeemed us to be 'zealous for good works' — the very zeal for work of the Lord Paul encourages.

In Philippians 2:16, Paul hopes he did not labor in vain — echoes the same phrase and confidence that labor is not futile.

Philippians 2:30 gives Epaphroditus as an example of risking life 'for the work of Christ' — embodying the steadfast labor urged here.

Colossians 1:23 urges believers to be stable and steadfast in the faith — the same call to perseverance Paul makes here.

In Galatians 6:9, Paul urges not growing weary in doing good, promising a harvest — same perseverance and reward theme.

Colossians 2:5 mentions Paul rejoicing over the steadfastness of their faith — the same virtue he commands here.

In Galatians 4:11, Paul fears his labor for them was in vain — opposite of the assurance here that labor is not in vain.

Colossians 2:7 calls believers to be 'rooted and built up' and 'abounding in thanksgiving' — mirroring the steadfastness and abounding in work urged here.

1 Thessalonians 1:3 remembers their 'work of faith and labor of love and steadfastness' — directly paralleling the steadfastness and work in this verse.

1 Thessalonians 3:3 warns against being moved by afflictions — a direct parallel to Paul's call here to be immovable in the Lord's work.

In 1 Thessalonians 3:5, Paul fears the tempter made his labor in vain — contrast to the certainty here that labor is not in vain.

Hebrews 3:14 emphasizes holding our confidence firm to the end — the same steadfastness Paul commands here.

In Matthew 25:31-40, serving the least is serving Christ himself, directly illustrating the 'work of the Lord' that is not in vain.

In 2 Chronicles 15:7, Asa is told not to let hands be weak because work will be rewarded — same encouragement as here.

In 2 Peter 3:14, believers are urged to be diligent and spotless in light of Christ's return — directly parallels the call to steadfastness because labor is not in vain.

In Matthew 10:40-42, Jesus promises that even small acts of kindness for his sake receive a reward, confirming that labor in the Lord is not in vain.

In Hebrews 6:10, God remembers your work and love shown in serving saints — directly assures labor is not overlooked.

Psalm 112:6 assures the righteous will never be shaken and be remembered forever — echoing Paul's call to be immovable and labor not in vain.

Psalm 78:37 describes Israel's heart as not steadfast — the direct opposite of Paul's command. This contrast warns against unfaithfulness.

In Psalm 73:13, the psalmist laments keeping heart clean 'in vain' — contrasts sharply with this verse's 'not in vain'.

In Psalm 55:22, God promises to sustain the righteous and keep them from being moved — directly supports the command to be steadfast and immovable.

In 1 Chr 22:16, David commands Solomon to 'arise and be working' with the Lord's presence — directly parallels Paul's call to give yourselves fully to the Lord's work.

In James 1:25, persevering as a doer brings blessing—aligning with the promise that labor in the Lord is not in vain.

In Hebrews 12:3, considering Christ's endurance prevents growing weary—supporting the call to be immovable and abounding here.

In Hebrews 10:35, 'do not throw away your confidence, which has a great reward' reinforces that steadfast labor is not in vain.

In Hebrews 6:19, hope is a 'steadfast anchor'—the foundation for the immovable confidence that our labor is not futile.

In 1 Thessalonians 3:8, Paul rejoices that they 'stand fast in the Lord'—mirroring the call to be steadfast and immovable here.

In 2 Thessalonians 2:15, Paul commands to 'stand firm'—a direct parallel to being steadfast and immovable in the Lord's work.

In Revelation 14:13, the blessing that deeds follow them reinforces the assurance here that labor in the Lord is not in vain.

Philippians 1:27 calls for 'standing firm' and striving together for the gospel — a strong parallel to being steadfast and abounding in the Lord's work.

In Neh 4:21, the people labored at the work from dawn to dusk while armed — a vivid example of persistent labor for God despite opposition.

In Neh 5:16, Nehemiah says he applied himself to the work on the wall — mirroring Paul's call to give yourselves fully to the Lord's work.

In Ps 44:18, the psalmist's heart has not turned back from God's way — a direct parallel to Paul's exhortation to stand firm and not be moved.

Isaiah 65:23 directly promises God's people that their labor will not be in vain—the same assurance Paul gives here.

Acts 11:23 exhorts believers to remain faithful with steadfast purpose — directly paralleling the call here to be steadfast and immovable.

Acts 20:24 shows Paul's determination to finish his ministry — a model of steadfast labor that is not in vain.

Romans 2:7 promises eternal life for those who persevere in well-doing — matching the assurance here that labor in the Lord is not in vain.

Galatians 5:1 commands 'stand firm' — directly paralleling the call to be steadfast and immovable in the Lord's work.

2 Corinthians 9:8 uses the same phrase 'abound in every good work,' showing God supplies grace for the very labor promised not to be vain.

In 2 Chr 12:14, Rehoboam did not set his heart to seek the Lord — contrasting with Paul's exhortation to be steadfast and fully devoted to God's work.

2 Peter 3:17 warns believers not to lose their stability — the same concern for steadfastness Paul urges here.

In Neh 6:4, Nehemiah's consistent reply to repeated opposition illustrates standing firm — similar to Paul's 'let nothing move you'.

Psalm 119:157 shows steadfastness amid persecution—reinforcing the call to be immovable in the Lord's work despite opposition.

In Hebrews 6:11, the call for earnestness until the end echoes the steadfastness and assurance that labor is not in vain.

Mark 7:7 warns that worship is in vain when based on human tradition — contrasting with the promise here that labor in the Lord is not in vain.

2 Corinthians 5:9 states the aim to please the Lord — echoing the motivation behind abounding in His work, even when results are unseen.

In Hebrews 13:21, God equips believers for every good work, reinforcing that our labor is empowered by Him and not in vain.

In Titus 3:1, 'be ready for every good work' aligns with abounding in the work of the Lord, though applied to civic obedience.

In 2 Peter 1:4-9, believers are to add virtue to faith — parallels the call to abound in the Lord's work, both requiring active perseverance.

In 2 Peter 1:8, the same concern for fruitful service is expressed — increasing virtues keep believers from being ineffective, echoing the promise that labor is not in vain.

Philippians 2:12 urges 'work out your own salvation' — a parallel call to active effort, though with a different focus on individual obedience.

John 6:29 defines the 'work of God' as believing — complementary to Paul's labor, but a different emphasis on faith as the foundation.

2 Corinthians 4:16 reinforces the encouragement not to lose heart, connecting the promise that labor in the Lord is not in vain to daily inner renewal.