# General Information:

He speaks to the tribes of Zebulun and Issachar as if they were one man, so "your" and "rejoice" here are singular. 

# Rejoice, Zebulun, in your going out, and you, Issachar, in your tents

The people of Zebulun traveled by sea and traded with other people. The people of Issachar preferred peaceful living and working the land and raising cattle.