Deuteronomy 20:18
That they teach you not to do after all their abominations, which they have done unto their gods; so should ye sin against the Lord your God.
Cross-reference
In Deuteronomy 7:4, the same warning appears: intermarriage with pagan nations would turn Israel's sons from God, just as here the nations' teachings lead to sin.
Deuteronomy 7:5 commands destroying altars and idols — the practical outworking of the command here to remove all pagan influence.
Deuteronomy 12:30 warns not to inquire about pagan worship after their destruction — directly expanding on the danger of learning their abominations.
Deuteronomy 12:31 gives examples of abominations like child sacrifice — illustrating the 'abominations' mentioned here that Israel must avoid.
Deuteronomy 12:4 forbids worshipping God like the pagans—reinforcing the same principle of not adopting their practices.
Exodus 23:33 states that letting nations dwell in the land would be a snare — the same rationale for destruction given here.
Joshua 23:13 warns that remaining nations become a snare — fulfilling the danger predicted here if Israel disobeys.
Judges 2:3 echoes that unexpelled nations become thorns and their gods a snare — a later consequence of not following this command.
Psalm 106:34-40 recounts Israel's failure to destroy the nations, leading to idolatry and judgment — a historical example of the warning here.
In 2 Corinthians 6:17, Paul echoes the same call to separate from ungodly practices, reinforcing the need to avoid contamination.
Ephesians 5:11 instructs believers not to participate in dark works—paralleling Deut 20:18's warning against learning abominations.
Revelation 18:3-5 calls God's people out of Babylon to avoid her sins—directly applying the separation command of Deut 20:18.
Leviticus 18:27 explains that the Canaanites' abominations defiled the land—the very reason Deut 20:18 commands destruction.
Ezra 9:1 laments Israel's failure to separate from pagan abominations—showing the consequence of ignoring Deut 20:18.