Charles Ellicott Commentary Genesis 24:1

"And Abraham was old, [and] well stricken in age. And Jehovah had blessed Abraham in all things." — Genesis 24:1 (ASV)

Abraham was old. —As Isaac was thirty-seven years of age when Sarah died (Genesis 23:1), and forty at his marriage (Genesis 25:20), Abraham, who was a centenarian at Isaac’s birth, would now be nearly 140. As he lived to be 175 (Genesis 25:7), he survived Isaac’s marriage thirty-five years, and lived to see Esau and Jacob nearly grown up.