Treasury of Scripture Knowledge
Then Judah said to his daughter-in-law Tamar, “
Remain a widow in your father’s house until my son Shelah grows up”; for he thought, “I am afraid that he too may die like his brothers.” So Tamar went and lived in her father’s house.
The sons of Judah: Er and Onan and Shelah and Perez and Zerah (but Er and Onan died in the land of Canaan). And the
sons of Perez were Hezron and Hamul.
sons of Judah according to their families were: of Shelah, the family of the Shelanites; of Perez, the family of the Perezites; of Zerah, the family of the Zerahites.
1 Chronicles 4:21
The sons of Shelah the son of Judah were Er the father of Lecah and Laadah the father of Mareshah, and the families of the house of the linen workers at Beth-ashbea;