Treasury of Scripture
the tabernacles. Tents are mentioned because it was the custom of these people, particularly the Ishmaelites, to live a migratory or wandering life; encamping sometimes in one place, and sometimes in another, as they found convenience for themselves and cattle; a custom retained by their descendants to the present day.
Edom
2 Chronicles 20:1,10,11 It came to pass after this also, that the children of Moab, and the children of Ammon, and with them other beside the Ammonites...
Hagarenes
Genesis 25:12-18 Now these are the generations of Ishmael, Abraham's son, whom Hagar the Egyptian, Sarah's handmaid, bore to Abraham...
1 Chronicles 5:10,19,20 And in the days of Saul they made war with the Hagarites, who fell by their hand...