In fulfillment of the promise of peaceful life, symbolized by the pouring of oil upon his head, Aaron's death, as described in the aggadah, was of a wonderful tranquility. Accompanied by Moses, his brother, and by Eleazar, his son, Aaron went to the summit of Mount Hor, where the rock suddenly opened before him and a beautiful cave lit by a lamp presented itself to his view. Moses said, "Take off your priestly raiment and place it upon your son Eleazar! and then follow me." Aaron did as commanded; and they entered the cave, where was prepared a bed around which angels stood. "Go lie down upon thy bed, my brother," Moses continued; and Aaron obeyed without a murmur. Then his soul departed as if by a kiss from God. The cave closed behind Moses as he left; and he went down the hill with Eleazar, with garments rent, and crying: "Alas, Aaron, my brother! thou, the pillar of supplication of Israel!" When the Israelites cried in bewilderment, "Where is Aaron?" angels were seen carrying Aaron's bier through the air. A voice was then heard saying: "The law of truth was in his mouth, and iniquity was not found on his lips: he walked with me in righteousness, and brought many back from sin" (Malachi 2:6). He died on the first of Av. The pillar of cloud which proceeded in front of Israel's camp disappeared at Aaron's death. The seeming contradiction between Numbers 20:22 et seq. and Deuteronomy 10:6 is solved by the rabbis in the following manner: Aaron's death on Mount Hor was marked by the defeat of the people in a war with the king of Arad, in consequence of which the Israelites fled, marching seven stations backward to Mosera, where they performed the rites of mourning for Aaron; wherefore it is said: "There Mosera died Aaron."