Genesis 17:23 References

23 Then Abraham took Ishmael his son, and all the servants who were aborn in his house and all who were bought with his money, every male among the men of Abraham's household, and circumcised the flesh of their foreskin in the very same day, bas God had said to him.

b Genesis 17:9-11

Genesis 17

9 God said further to Abraham, "Now as for you, ayou shall keep My covenant, you and your descendants after you throughout their generations.
10 "aThis is My covenant, which you shall keep, between Me and you and your descendants after you: every male among you shall be circumcised.
11 "And ayou shall be circumcised in the flesh of your foreskin, and it shall be the sign of the covenant between Me and you.

Other references for Genesis 17:23

a Genesis 14:14