Numbers 31:18 commands keeping virgin captives alive for yourselves — a direct precedent for taking captive wives as later regulated in Deuteronomy 21:11.

Judges 14:3 records parental objection to marrying an uncircumcised Philistine — contrasting with Deuteronomy 21:11's permission to marry a captive foreign woman.

Exodus 21:8 addresses a master taking a female slave as wife — a parallel legal situation of a man taking a woman from a subordinate position into marriage.

Proverbs 31:30 contrasts fleeting beauty with fearing the Lord — opposing the focus on beauty in Deuteronomy 21:11's permission to take a beautiful captive.