13 discard her captive's garb, and shall remain in your house a full month, mourning for her father and mother; after that you may go in to her and be her husband, and she shall be your wife.

Matthew Henry's Commentary on Deuteronomy 21:13

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.