Hebrews 6:18 says God's unchangeable purpose gives strong encouragement to hold fast the hope—directly supporting the basis in 10:23.

Hebrews 4:14 commands 'let us hold fast our confession,' virtually identical to 10:23's exhortation to hold fast the hope.

Hebrews 3:14 ties holding the original confidence to the end with sharing in Christ, echoing 10:23's call to hold fast without wavering.

In Hebrews 3:6, holding fast confidence is the condition for being God's house—reinforcing the same persevering hope commanded in 10:23.

In Hebrews 12:28, the exhortation to serve God with reverence based on an unshakable kingdom echoes the call to hold fast without wavering.

In Hebrews 12:15, the warning against falling short of grace complements the call to hold fast, showing the danger of wavering.

Hebrews 11:11 shows Sarah considering God faithful who promised—an example of the same faithfulness that grounds the hope in 10:23.

1 Corinthians 1:9 declares 'God is faithful,' matching the assurance in 10:23 that he who promised is faithful—the basis for holding fast.

In Titus 1:2, God cannot lie, so His promise of eternal life is unbreakable—deepening the basis for unwavering hope.

In 1 Thessalonians 5:24, God's faithfulness to call and complete His work reinforces the same assurance that grounds holding fast to hope.

In 2 Thessalonians 3:3, the Lord's faithfulness includes strengthening and protection—expanding what His promised faithfulness means for perseverance.

In Deuteronomy 7:9, God is described as faithful to His covenant—providing the OT root for the same attribute that secures hope.

In 2 Timothy 1:13, Paul commands Timothy to 'hold fast the pattern of sound words', directly paralleling the call to hold fast confession.

In 1 Thessalonians 5:21, the same verb 'hold fast' is used for testing and retaining what is good, paralleling the call to hold fast confession.

In 1 Thessalonians 3:8, Paul rejoices that they are 'standing fast in the Lord', echoing the exhortation to hold fast.

In Philippians 4:1, Paul similarly urges believers to 'stand firm in the Lord', reinforcing the call to persevere in faith.

In 1 John 1:9, God's faithfulness to forgive sins when we confess reinforces the assurance of 'He who promised is faithful'.

In 1 Corinthians 15:2, salvation is contingent on holding fast to the gospel—mirroring the same necessity of perseverance in hope.

In Revelation 2:13, the church at Pergamum is commended for 'holding fast my name' under persecution, exemplifying the call to hold fast.

In Revelation 2:25, the command to 'hold fast what you have till I come' directly parallels the exhortation to hold fast the confession of hope.

In Lamentations 3:23, God's faithfulness is celebrated as fresh each morning—reinforcing the same steadfast character that upholds hope.

James 1:6 warns against doubting, which contrasts with the unwavering faith required to hold fast in 10:23—wavering vs. steadfastness.

In Revelation 3:11, Jesus says 'hold fast what you have'—a parallel command to persevere, though in a different apocalyptic context.

In Romans 11:22, God's kindness is conditional on continuing in it—adding a warning that faithfulness requires ongoing obedience.

In Luke 18:8, Jesus questions whether faith will be found—shifting focus to human perseverance, complementing the call to hold fast.

In 2 Chronicles 36:22, God fulfills His word through Cyrus—a concrete example of His faithfulness to promises, echoing the main verse's ground.

In Galatians 5:1, believers are called to stand firm in freedom—a parallel exhortation to steadfastness, though with a different focus.