1 Samuel 20:31

20:31 For as long as this son of Jesse is alive on the earth, you and your kingdom will not be established. Now, send some men and bring him to me. For he is as good as dead!”

Genesis 17:12

17:12 Throughout your generations every male among you who is eight days old must be circumcised, whether born in your house or bought with money from any foreigner who is not one of your descendants.