Genesis 11:12-15

12 When Arphaxad had lived 35 years, he became the father of Shelah.

13 And after he became the father of Shelah, Arphaxad lived 403 years and had other sons and daughters.

14 When Shelah had lived 30 years, he became the father of Eber.

15 And after he became the father of Eber, Shelah lived 403 years and had other sons and daughters.