Genesis 14:14

14:14 When Abram heard that his nephew had been taken captive, he mobilized his 318 trained men who had been born in his household, and he pursued the invaders as far as Dan.

Genesis 15:3

15:3 Abram added, “Since you have not given me a descendant, then look, one born in my house will be my heir!”

Exodus 12:44

12:44 But everyone’s servant who is bought for money, after you have circumcised him, may eat it.

Exodus 21:4

21:4 If his master gave him a wife, and she bore sons or daughters, the wife and the children will belong to her master, and he will go out by himself.