Genesis 16:15-17:1

15So Hagar bore Abram a son, and Abram gave the name Ishmael to the son she had borne. 16Abram was eighty-six years old when Hagar bore him Ishmael.

The Covenant of Circumcision 1When Abram was ninety-nine years old, the LORD appeared to him and said, “I am God Almighty Hebrew El-Shaddai ; walk before me faithfully and be blameless.