1 Thessalonians 3:6 reports the good news that resolved Paul's fears — the outcome of the concern expressed in 3:5.

1 Thessalonians 3:2 details Timothy's mission to strengthen and encourage — the very purpose behind Paul's concern in 3:5.

1 Thessalonians 3:1 sets the scene for Paul's decision; 3:5 repeats the phrase 'when I could stand it no longer' and motivates the action.

In 1 Thessalonians 2:1, Paul had earlier assured the Thessalonians that his visit was not in vain, but here he fears it could be.

Matthew 4:3 explicitly calls Satan 'the tempter,' the same title used here for the one Paul fears has tempted the Thessalonians.

Philippians 2:16 uses the same 'run in vain or labor in vain' phrase, showing Paul's recurring hope.

Galatians 4:11 has Paul using nearly identical words: afraid his labor over them was in vain.

Galatians 2:2 expresses Paul's same concern that his gospel work might be in vain, using similar language.

2 Corinthians 11:13-15 reveals Satan disguises himself as an angel of light, expanding on the tempter's deceptive methods that Paul feared here.

2 Corinthians 11:3 directly parallels: Paul fears the Corinthians being deceived by Satan's cunning, just as he feared the tempter had tempted the Thessalonians.

Isaiah 49:4 uses the same 'labor in vain' lament, showing Paul echoing the prophet's anxiety and trust in God.

In 2 Corinthians 11:29, Paul shares his deep concern for those led into sin — his fear for the Thessalonians is a specific instance of that same pastoral anxiety.

1 Corinthians 15:58 encourages that labor in the Lord is not in vain — Paul's fear of vain labor highlights the need to stand firm against temptation.

Colossians 1:23 conditions salvation on continuing in faith, established and firm — Paul's fear that the tempter caused them to waver underscores this need for perseverance.

Romans 11:22 warns that falling away leads to being cut off — Paul's fear of the tempter causing them to fall echoes this warning to persevere.

In Luke 8:13, Jesus describes those who fall away during testing — Paul's fear that the tempter caused the Thessalonians to fall away echoes this pattern.

In 2 Corinthians 7:5-7, Paul's similar anxiety about the Corinthians is relieved by Titus’ report, paralleling his fear here that the tempter undermined their faith.

Galatians 1:6-9 shows Paul's distress over a different gospel, echoing his fear here that the tempter would make his labor vain by corrupting their faith.

2 Corinthians 2:11 urges awareness of Satan's designs, reinforcing Paul's concern here about being outwitted by the tempter's schemes.

2 Corinthians 11:2 shows Paul's divine jealousy to present the church pure to Christ, mirroring his fear here that his labor would be in vain if they were led astray.

Ephesians 4:14 warns against being tossed by deceitful schemes, the kind of deception from the tempter that Paul feared would undermine the Thessalonians.

In 1 Corinthians 7:5, Paul warns that Satan may tempt believers through marital abstinence, showing another context where Satan exploits human weakness.

Colossians 4:8 describes Paul sending Tychicus to encourage hearts — just as he sent Timothy in this passage to check on their faith and strengthen them.

Acts 15:36 shows Paul's pattern of revisiting churches to confirm their faith — the same pastoral concern behind sending Timothy.