Genesis 17:21-27 Tree of Life Version (TLV)
21 But My covenant will I establish with Isaac whom Sarah will bear to you at this set time next year.”
22 When He finished speaking with him, God went up from Abraham.
23 Then Abraham took Ishmael his son and all of his house-born slaves and all his purchased slaves—every male among the men of Abraham’s house—and he circumcised the flesh of their foreskin on this very same day, just as God had spoken with him. 24 Abraham was 99 years old when he was circumcised in the flesh of his foreskin, 25 and his son Ishmael was 13 years old when he was circumcised in the flesh of his foreskin. 26 On this very same day Abraham and Ishmael his son were circumcised. 27 Also all the men of his house, house-born slaves and slaves purchased from a foreigner, were circumcised with him.