Issachar is a strong ass couching down between two burdens:
A prophetic blessing from Jacob to his son Issachar.
Genesis 49:14
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
12His eyes shall be red with wine, and his teeth white with milk.
13Zebulun shall dwell at the haven of the sea; and he shall be for an haven of ships; and his border shall be unto Zidon.
14Issachar is a strong ass couching down between two burdens:
15And 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.
16Dan shall judge his people, as one of the tribes of Israel.