Original Verse:
Isaiah Chapter 16 Verse 2For it shall be that, as wandering birds, as a scattered nest, so shall the daughters of Moab be at the fords of the Arnon.

Reference Verses:
Numbers Chapter 21 Verse 29Woe to thee, Moab! Thou art undone, O people of Chemosh: He hath given his sons as fugitives, And his daughters into captivity, Unto Sihon king of the Amorites.
Numbers Chapter 21 Verse 13From thence they journeyed, and encamped on the other side of the Arnon, which is in the wilderness, that cometh out of the border of the Amorites: for the Arnon is the border of Moab, between Moab and the Amorites.
Jeremiah Chapter 48 Verse 9Give wings unto Moab, that she may fly and get her away: and her cities shall become a desolation, without any to dwell therein.