Blessed are You, Lord, our God, Ruler of the Universe, Who has sanctified us with mitzvot and commanded us to immerse ourselves within words of Torah.

(1) A song of ascents. Of David. How good and how pleasant it is that brothers dwell together. (2) It is like fine oil on the head running down onto the beard, the beard of Aaron, that comes down over the collar of his robe; (3) like the dew of Hermon that falls upon the mountains of Zion. There the LORD ordained blessing, everlasting life.

(1) Another comment upon the verse And the Lord said to Aaron: “Go into the wilderness to meet Moses” (Exod. 4:27). Scripture says elsewhere in reference to this verse: O that thou wert as my brother (Song 8:1). The Israelites said to the Holy One, blessed be He:, O that thou wert as my brother, yet you find that all brothers hated each other. Cain hated Abel, as it is said: And Cain rose up against Abel his brother (Gen. 4:8). Ishmael hated Isaac, as is said: And Sarah saw the son of Hagar the Egyptian, whom she had borne unto Abraham, making sport (Gen. 21:9). Making sport implies, in this instance, that he wanted to kill him, as it is said: Let the young men, I pray thee, arise and make sport before us (II Sam. 2:14). Esau hated Jacob, as is said: And Esau said in his heart, etc. (Gen. 27:41). And the tribes hated Joseph, as it is said: And they hated him (Gen. 37:4). But in this instance the Israelites asked of the Holy One, blessed be He: Do you mean like Moses and Aaron, of whom it is said: Behold how good and how pleasant it is for brethren to dwell together in unity (Ps. 133:1)? They loved and cherished each other. At the time that Moses took the kingship and Aaron the priesthood, they bore no resentment toward each other. In fact, they rejoiced in each other’s exalted role.

(8) R. Hiyya the son of Joseph stated: Throughout the seven days of dedication, Moses took the Mishkan apart and re-assembled it twice each day...R. Chanina held that he did so three times each day...