Numbers 21:12

From thence they removed, and pitched in the valley of Zared.

The valley of Zared is the brook Zered, where Israel encamped on the way toward the promised land. After traveling south around Edom, the people turned north, crossed the brook Zered, and continued east of Moab toward the promised land. The Moabites and Ammonites living nearby were descendants of Lot, and Israel had been commanded not to molest them.