11 and see among the captives a beautiful woman, and you have desire for her and would take her for yourself as wife, 12 then you shall bring her home to your house, and she shall shave her head and pare her nails. 13 And she shall put off her captive's garb, and shall remain in your house and bewail her father and her mother a full month; after that you may go in to her, and be her husband, and she shall be your wife.

Matthew Henry's Commentary on Deuteronomy 21:11-13

Commentary on Deuteronomy 21:10-14

(Read Deuteronomy 21:10-14)

By this law a soldier was allowed to marry his captive, if he pleased. This might take place upon some occasions; but the law does not show any approval of it. It also intimates how binding the laws of justice and honour are in marriage; which is a sacred engagement.