Genesis 11:12

12 When Arpachshad was 35 years old, he had a son, Shelah;

Genesis 11:12 Meaning and Commentary

Genesis 11:12

And Arphaxad lived thirty five years, and begat Salah.
] Arphaxad is the first on record that had a son born to him so early; of Salah, (See Gill on Genesis 10:24).

Genesis 11:12 In-Context

10 These are the descendants of Shem. Two years after the flood, when Shem was 100 years old, he had a son, Arpachshad.

11 After that, he lived another 500 years and had other children.

12 When Arpachshad was 35 years old, he had a son, Shelah;

13 after that, he lived another 403 years and had other children.

14 When Shelah was 30 years old, he had a son, Eber;