Don’t be happy when your enemy has troubles. Don’t be glad when they fall.
Proverbs 24:17 (ERV)
If your enemy is hungry, give him food! If he is thirsty, give him something to drink! This will make him feel ashamed of himself, and God will reward you.
Proverbs 25:21-22 (TLB)
But I tell you to love your enemies and pray for anyone who mistreats you. Then you will be acting like your Father in heaven. He makes the sun rise on both good and bad people. And He sends rain for the ones who do right and for the ones who do wrong. If you love only those people who love you, will God reward you for that? Even tax collectors love their friends.
Matthew 5:44-46 (CEV)