Sifrei Devarim 211/ספרי דברים רי״א

2“Upon your enemies” (Dt. 21:10)—that is, against your enemies,[but not in an alliance with them].

3“And HASHEM your God has delivered him into your hands” (Dt. 21:10)—if you have performed all that is stated here,in the end, HASHEM your God will deliver himinto your hands!

42. “And you take him captive” (Dt. 21:10)—including any Canaanites that might be within.

5“And you see among the captured” (Dt. 21:11)—that is, during her captivity.

6“A woman” (Dt. 21:11)—even though she is a married woman.

7“In fine shape” (Dt. 21:11)—I infer from this only thatshe may be taken [as a war-bride]only as long as she is a beauty.How do I know thatshe may be taken even if she is ugly?The Teaching states:“And you desire her” (Dt. 21:11)—even though she’s not in fine shape.

8“Then you may take her as your wife” (Dt. 21:11)—lest you say:this one’s for my father, and that one’s for my brother!