Deuteronomy 3:3

3:3 So the Lord our God did indeed give over to us King Og of Bashan and his whole army and we struck them down until not a single survivor was left.

Deuteronomy 19:15

19:15 A single witness may not testify against another person for any trespass or sin that he commits. A matter may be legally established only on the testimony of two or three witnesses.

Deuteronomy 20:16

Laws Concerning War with Canaanite Nations

20:16 As for the cities of these peoples that the Lord your God is going to give you as an inheritance, you must not allow a single living thing to survive.

Deuteronomy 29:21

29:21 The Lord will single him out for judgment from all the tribes of Israel according to all the curses of the covenant written in this scroll of the law.