Isaiah 16:1

1. Send ye the lamb Collective for lambs, the traditional yearly tribute due to Judah. It appears from 2 Kings 3:41, that when Moab was tributary to Jehoram, king of Israel, this tribute amounted to “a hundred thousand lambs, and a hundred thousand rams, with the wool.”

From Sela to the wilderness That is, from along all the foraging region for Moab’s flocks. Sela means rock, a city built into an amphitheatre of rocky hills. It was the capital of Edom, and was afterward, under Roman rule, named Petra. It lies about a journey of a day and a half southeast from the southern end of the Dead Sea. The ruins of the city are frequently visited, and its dwellings, tombs, and temples are found to be cut out of the soft red sandstone. Its ingress and egress is by a two-mile valley, very narrow, called Wady Mousa. This Petra seems to have been in the hands of Moab at the time of this prophecy by Isaiah. Underneath the outward expression in the text is doubtless a reference to true relief and salvation through offerings of the sacrificial lambs. Jehovah is the speaker through his prophet, who here appears to sympathize and mourn with Moab.