Genesis 17:13

17:13 They must indeed be circumcised, whether born in your house or bought with money. The sign of my covenant will be visible in your flesh as a permanent reminder.

Deuteronomy 4:13

4:13 And he revealed to you the covenant he has commanded you to keep, the ten commandments, writing them on two stone tablets.

Jeremiah 31:31-34

31:31 “Indeed, a time is coming,” says the Lord, “when I will make a new covenant with the people of Israel and Judah. 31:32 It will not be like the old covenant that I made with their ancestors when I delivered them from Egypt. For they violated that covenant, even though I was like a faithful husband to them,” says the Lord. 31:33 “But I will make a new covenant with the whole nation of Israel after I plant them back in the land,” says the Lord. “I will put my law within them and write it on their hearts and minds. I will be their God and they will be my people.

31:34 “People will no longer need to teach their neighbors and relatives to know me. For all of them, from the least important to the most important, will know me,” says the Lord. “For I will forgive their sin and will no longer call to mind the wrong they have done.”

Romans 11:26-27

11:26 And so all Israel will be saved, as it is written:

“The Deliverer will come out of Zion;

he will remove ungodliness from Jacob.

11:27 And this is my covenant with them,

when I take away their sins.”