Easton's Bible Dictionary (1897)
=Zared, luxuriance; willow bush, a brook or valley communicating with the Dead Sea near its southern extremity (Num. 21:12; Deut. 2:14). It is called the “brook of the willows” (Isa. 15:7) and the “river of the wilderness” (Amos 6:14). It has been identified with the Wady el-Aksy.
Smith's Bible Dictionary (1863)
(osier brook), (2:13,14) or Za’red, (Numbers 21:12) a brook or valley running into the Dead Sea near its southeast corner, which Dr. Robinson with some probability suggests as identical with the Wady el-Ahsy . It lay between Moab and Edom and is the limit of the proper term of the Israelites’ wandering.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
, of trees), VALLEY or BROOK OF, a valley separating Moab from Edora. Deut 2:13-14; called "Zared" in Num 21:12. Robinson identified it with Wady el-Aksi; others, including Tristram, propose Wady Sidiyeh or the Seil Gharabi, a branch of the Sediyeh, down which runs a fine stream that empties into the south-eastern corner of the Dead Sea. This wady most likely constituted the boundary between Moab and Edom, as it is now the recognized boundary between Kerak and Petra.