'Enemy' in the Bible

Don't rejoice when your enemy falls. Don't let your heart be glad when he is overthrown;

If your enemy is hungry, give him food to eat. If he is thirsty, give him water to drink:

Faithful are the wounds of a friend; although the kisses of an enemy are profuse.

Whoever is an accomplice of a thief is an enemy of his own soul. He takes an oath, but dares not testify.