Verses with the word enmity in the Old Testament (3 verses):

Genesis 3:15
And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.

Numbers 35:21
Or in enmity smite him with his hand, that he die: he that smote him shall surely be put to death; for he is a murderer: the revenger of blood shall slay the murderer, when he meeteth him.

Numbers 35:22
But if he thrust him suddenly without enmity, or have cast upon him any thing without laying of wait,