Why does it mention his wealth?
Malbim (1, 3): Sometimes one falters due to poverty ? "Kol Achei Rash Sene'uhu" (Mishlei 19:7). He had flocks, cattle, fields, vineyards, slaves and workers doing his work. He was not prone to falter!
Why does it mention his possessions in this order ? flock, camels, cattle??
Rashi: It counts first what had the greatest number 1 .
So the species of spoils taken from Midyan (Bamidbar 31:32-35) are listed in descending order of quantity. (PF)
What is "umi'Kol Bnei Kedem"?
Rashi: More than Dor ha'Flagah, about whom it says "va'Yhi b'Nas'am mi'Kedem" (Bereishis 11:2). He was not greater than Avraham, 'ha'Adam ha'Gadol ba'Anakim" (Yehoshua 14:15). The two prefixes Hei hint that he stood in 10 (their combined Gematriya) tests. Iyov stood only in one test.
Rashi (1): From all people of the east. Aram is in the east ? "Min Aram Yancheni Valak? me'Harerei Kedem" (Bamidbar 23:7).
Malbim: He was great in their eyes with a great reputation, and they favored him. If he would falter, people would save him!
