11 and see among the captives a beautiful woman, and you have desire for her and would take her for yourself as wife,

Matthew Henry's Commentary on Deuteronomy 21:11

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.