“When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.”
Genesis 21:4 (BSB)
Context Reading
2So Sarah conceived and bore a son to Abraham in his old age, at the very time God had promised. 3And Abraham gave the name Isaac to the son Sarah bore to him. 4When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him. 5Abraham was a hundred years old when his son Isaac was born to him. 6Then Sarah said, “God has made me laugh, and everyone who hears of this will laugh with me.”