Genesis 17:24 in the King James Version
And Abraham was ninety years old and nine, when he was circumcised in the flesh of his foreskin.
Context
23 Abraham took Ishmael his son, all who were born in his house, and all who were bought with his money: every male among the men of Abraham’s house, and circumcised the flesh of their foreskin in the same day, as God had said to him.
24 Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin.
25 Ishmael, his son, was thirteen years old when he was circumcised in the flesh of his foreskin.