Genesis 50:9-11

Young's Literal Translation

⁹ and there go up with him both chariot and horsemen, and the camp is very great.

¹⁰ And they come unto the threshing-floor of Atad, which [is] beyond the Jordan, and they lament there, a lamentation great and very grievous; and he maketh for his father a mourning seven days,

¹¹ and the inhabitant of the land, the Canaanite, see the mourning in the threshing-floor of Atad, and say, `A grievous mourning [is] this to the Egyptians;' therefore hath [one] called its name `The mourning of the Egyptians,' which [is] beyond the Jordan.