Mosera

a bond, one of the stations of the Israelites in the wilderness (Deut 10:6), at the foot of Mount Hor. [Comp. (Num 33:37 ; 33:38)]. It has been identified with el-Tayibeh, a small fountain at the bottom of the pass leading to the ascent of Mount Hor.

EBD - Easton's Bible Dictionary