Genesis 46:12 The sons of Judah: Er, Onan, Shelah, Perez, and Zerah; but Er and Onan died in the land of Canaan. The sons of Perez were Hezron and Hamul. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
Numbers 26:21 The sons of Perez were: of Hezron, the family of the Hezronites; of Hamul, the family of the Hamulites. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)
1 Chronicles 2:5 The sons of Perez: Hezron, and Hamul. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)