Atad

buckthorn, a place where Joseph and his brethren, when on their
way from Egypt to Hebron with the remains of their father Jacob,
made for seven days a "great and very sore lamentation." On this
account the Canaanites called it "Abel-mizraim" (Gen. 50:10,
11). It was probably near Hebron. The word is rendered "bramble"
in Judg. 9:14, 15, and "thorns" in Ps. 58:9.