Genesis 25:20 NASB95
and Isaac was forty years old when he took Rebekah, the daughter of Bethuel the Aramean of Paddan-aram, the sister of Laban the Aramean, to be his wife.

Genesis 25:26 NASB95
Afterward his brother came forth with his hand holding on to Esau's heel, so his name was called Jacob; and Isaac was sixty years old when she gave birth to them.

Genesis 35:28 NASB95
Now the days of Isaac were one hundred and eighty years.