Ezekiel 20:12; Genesis 9:12; Genesis 17:11

12 Moreover, I gave them rmy Sabbaths, as a sign between me and them, sthat they might know that I am the Lord who sanctifies them.

12 And God said, bThis is the sign of the covenant that I make between me and you and every living creature that is with you, for all future generations:

11 You shall be circumcised in the flesh of your foreskins, and it shall be a zsign of the covenant between me and you.