Numbers 1:28-29

1:28 From the descendants of Issachar: According to the records of their clans and families, all the males twenty years old or older who could serve in the army were listed by name. 1:29 Those of them who were numbered from the tribe of Issachar were 54,400.

Numbers 2:5-6

2:5 Those who will be camping next to them are the tribe of Issachar. The leader of the people of Issachar is Nethanel son of Zuar. 2:6 Those numbered in his division are 54,400.