Numbers 21:13-14
Book <05612> [in the book.]
Waheb <02052> [What he did. or, Vaheb in Suphah.]
The following seems to be the sense of this passage: "From Vaheb in Suphah, and the torrents of Arnon, even the effusion of the torrents, which goeth down to the dwelling of Ar, and lieth for the boundary of Moab; even from thence to the well; (which is the well of which Jehovah spake unto Moses, Gather the people, and I will give them water. Then sang Israel this song: Spring up, O Well! Answer ye to it. The well, princes digged it; even nobles of the people digged it, by a decree, upon their borders;) and from the wilderness (or the well, as in LXX.) to Mattanah; and from Mattanah," etc. The whole of this, from ver. 14-20, is a fragment from "the book of the wars of Jehovah," probably a book of remembrances or directions written by Moses for the use of Joshua, and describes the several boundaries of the land of Moab. This rendering removes every obscurity, and obviates every difficulty.
Numbers 21:26-28
Arnon <0769> [Arnon.]
Arnon is a stream which takes its rise in the mountains of Moab, and, by a north-west course, during which it receives the waters of several streams, runs into the Dead sea. It is now called Wady Modjeb, and divides the province of Pelka from that of Kerek, as it formerly divided the kingdoms of the Moabites and Amorites. Its principal source is at a short distance to the north-east of Katrane, a station of the Syrian Hadj, where it is called Seyl Sayde; and lower down it receives the name of Esseim el Kereim, or Szefye.
fire <0784> [a fire.]
Ar ... Moab <06144 04124> [Ar of Moab.]