Genesis 50:10-11

10When they reached the threshing floor of Atad, which is across the Jordan, they lamented and wept loudly, and Joseph mourned seven days for his father.

11When the Canaanite inhabitants of the land saw the mourning at the threshing floor of Atad, they said, “This is a solemn mourning on the part of the Egyptians.” Therefore the place is named Abel-mizraim. It is across the Jordan.