Genesis 49:15 KJV
And he saw that rest was good, and the land that it was pleasant; and bowed his shoulder to bear, and became a servant unto tribute.
Genesis 49:15, King James Version
In context
14 Issachar is a strong ass couching down between two burdens:
15 And he saw that rest was good, and the land that it was pleasant; and bowed his shoulder to bear, and became a servant unto tribute.
16 Dan shall judge his people, as one of the tribes of Israel.