Genesis 49:14-15
From Reconciling understandings of Scripture and Science
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.
The meaning of נָטָה (natah)
From the NET Bible notes to Psalm 144:5: