When Terah was 70 years old, he became the father of Abram, Nahor, and Haran.

Luke 3:34
the son of Jacob, the son of Isaac, the son of Abraham, the son of Terah, the son of Nahor,

Genesis 11:25
And after he had become the father of Terah, Nahor lived 119 years and had other sons and daughters.

Joshua 24:2
And Joshua said to all the people, "This is what the LORD, the God of Israel, says: 'Long ago your fathers, including Terah the father of Abraham and Nahor, lived beyond the Euphrates and worshiped other gods.

And Terah lived seventy years, and begat Abram, Nahor, and Haran.