Ezra 10:19
And they gave their hands that they would put away their wives; and being guilty, they offered a ram of the flock for their trespass.
Cross-reference
In Leviticus 5:15, a ram is prescribed as a guilt offering for trespass against holy things — exactly the offering Ezra's men bring for their sin.
Leviticus 6:6 also requires a ram for a guilt offering, matching the type of offering made in Ezra.
Malachi 2:12 pronounces a curse on those who marry foreign wives — the same sin being addressed in Ezra.
2 Corinthians 6:14 warns against being unequally yoked with unbelievers — a New Testament application of the same principle.
Galatians 2:9 describes giving right hands as a sign of fellowship with Gentiles, contrasting with Ezra 10:19 where giving hands meant separation from them.
2 Kings 10:15 uses the 'giving the hand' gesture as a covenant of loyalty, similar to the pledge in Ezra 10:19 to divorce foreign wives.
1 Chronicles 29:24 uses the same 'gave their hand' idiom for submitting to Solomon, as in Ezra 10:19 for pledging to divorce.
2 Chronicles 30:8 calls to 'give the hand' to the Lord, similar to the pledge in Ezra 10:19 to obey God's law.