1 Chronicles 7:1

Now the sons of Issachar were, Tola, and Puah, Jashub, and Shimron, four.

Cross-reference

Genesis 46:13 lists Issachar's sons (Tola, Puvah, Job, Shimron) — the same genealogy with slight name variations (Puvah/Puah, Job/Jashub).

Numbers 26:23 records the clans of Tola and Puvah from Issachar — directly parallel to the sons listed here.

Numbers 26:24 continues with clans of Jashub and Shimron from Issachar — matching the remaining sons listed here.