Numbers 1:36

Of the children of Benjamin, by their generations, after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, all that were able to go forth to war;

Cross-reference

Numbers 26:41 gives the second census of Benjamin, allowing comparison of tribal growth over time.

Genesis 35:16-18 narrates Benjamin's birth and naming, providing the origin of the tribe counted here.

Genesis 46:21 lists Benjamin's sons who went to Egypt, detailing the family origins of the tribe numbered here.

Genesis 46:19 lists Benjamin as a son of Rachel, showing the patriarch of the tribe counted here.