Genesis 46:11-15

And the sons of Levi: Gershon, Kohath, and Merari.

And the sons of Judah: Er, Onan, Shelah, Perez, and Zerah (but Er and Onan died in the land of Canaan). And the sons of Perez were Hezron and Hamul.

And the sons of Issachar: Tola, Puvvah, Iob, and Shimron.

And the sons of Zebulun: Sered, Elon, and Jahleel.

These are the sons of Leah, whom she bore to Jacob in Paddan-aram, with his daughter Dinah; all his sons and his daughters numbered thirty-three.