7. Now when this purification, which their leader made upon the mourning for his sister, as it has been now described, was over, he caused the army to remove and to march through the wilderness and through Arabia; and when he came to a place which the Arabians esteem their metropolis, which was formerly called Arce, but has now the name of Petra, at this place, which was encompassed with high mountains, Aaron went up one of them in the sight of the whole army, Moses having before told him that he was to die, for this place was over against them. He put off his pontifical garments, and delivered them to Eleazar his son, to whom the high priesthood belonged, because he was the elder brother; and died while the multitude looked upon him. He died in the same year wherein he lost his sister, having lived in all a hundred twenty and three years. He died on the first day of that lunar month which is called by the Athenians Hecatombaeon, by the Macedonians Lous, but by the Hebrews Abba. CHAPTER 5. How Moses Conquered Sihon And Og Kings Of The Amorites, And Destroyed Their Whole Army And Then Divided Their Land By Lot To Two Tribes And A Half Of The Hebrews. 1. The people mourned for Aaron thirty days, and when this mourning was over, Moses removed the army from that place, and came to the river Arnon, which, issuing out of the mountains of Arabia, and running through all that wilderness, falls into the lake Asphaltitis, and becomes the limit between the land of the Moabites and the land of the Amorites. This land is fruitful, and sufficient to maintain a great number of men, with the good things it produces. Moses therefore sent messengers to Sihon, the king of this country, desiring that he would grant his army a passage, upon what security he should please to require; he promised that he should be no way injured, neither as to that country which Sihon governed, nor as to its inhabitants; and that he would buy his provisions at such a price as should be to their advantage, even though he should desire to sell them their very water. But Sihon refused his offer, and put his army into battle array, and was preparing every thing in order to hinder their passing over Arnon.