Proverbs 24:17

24:17 Do not rejoice when your enemy falls,

and when he stumbles do not let your heart rejoice,

Proverbs 25:21

25:21 If your enemy is hungry, give him food to eat,

and if he is thirsty, give him water to drink,

Proverbs 29:24

29:24 Whoever shares with a thief is his own enemy;

he hears the oath to testify, but does not talk.