In Joshua 7:1, Achan's sin directly violates the warning, bringing the very trouble foretold.

In Joshua 7:11, God declares Israel has taken the accursed thing, confirming the sin warned against.

Joshua 7:12 shows the exact consequence warned in 6:18: Israel becomes accursed and God withdraws because Achan took devoted things.

Joshua 7:15 specifies the penalty for violating the command in 6:18: the one with the devoted thing is burned, confirming the warning.

Joshua 7:25 directly fulfills 6:18: Achan 'troubles' Israel and is punished, just as the warning predicted.

Joshua 22:18-20 explicitly recalls Achan's sin from 6:18 as proof that one man's trespass brings wrath on the whole congregation.

Joshua 7:24 shows the consequence of violating the warning — Achan's entire household is destroyed for taking the accursed things, fulfilling the threat in 6:18.

Deuteronomy 7:26 gives the original law against bringing devoted things into one's house, which Joshua 6:18 directly echoes.

In 2 Corinthians 6:17, 'touch not the unclean thing' directly parallels the warning to keep from the accursed thing.

1 Chronicles 2:7 identifies Achan as 'the troubler of Israel' who transgressed in the accursed thing — a direct historical reference to the event warned about in Joshua 6:18.

Deuteronomy 13:17 likewise commands removal of devoted things to avert God's anger, a parallel principle to Joshua 6:18.

In Hebrews 12:15, a root of bitterness defiles many — similar warning that one person's disobedience can bring a curse on the whole community.

Jonah 1:12 parallels 6:18: one man's disobedience (Jonah) endangers the whole crew, requiring removal to stop the trouble.

Proverbs 15:27 warns that greed for gain troubles one's house — Achan's greed for the accursed things troubled the whole camp as warned in Joshua 6:18.

In 1 Kings 18:18, Elijah reverses the accusation: the true troubler is the one who forsakes God's commands — echoing the principle that disobedience brings trouble.

In 1 Kings 18:17, Ahab uses the same 'troubler of Israel' accusation — a term from Joshua's warning about the accursed things that brings trouble on the camp.

2 Samuel 21:1 parallels 6:18: a sin (Saul killing Gibeonites) brings national trouble (famine), requiring atonement.

1 Samuel 14:28-42 parallels 6:18: a forbidden act (eating honey) brings trouble, and lots identify the guilty party.

Ecclesiastes 9:18 states one sinner destroys much good, echoing the corporate harm from Achan's sin in 6:18.

In Ephesians 5:11, 'have no fellowship with dark works' mirrors the command to separate from the accursed thing.

Deuteronomy 23:9 gives a broader command for the camp to avoid wickedness — Joshua 6:18 applies this specifically to the devoted things during Jericho's conquest.

In James 1:27, 'keep unspotted from the world' parallels the call to avoid contamination from the accursed thing.

In 1 John 5:21, 'keep yourselves from idols' parallels avoiding the accursed thing, as idols are abominations.