Numbers 12:10

And the cloud departed... — The withdrawal of the cloud was the visible token of the Divine displeasure. The word sar, departed, which is here used, is an entirely different word from that which occurs in Numbers 9:17 : “When the cloud was taken up from the tabernacle.” The lifting up of the cloud was the signal for the breaking up of the camp and the resumption of the march; the withdrawal of the cloud was the token of the withdrawal of the Divine presence and direction.

Leprous, white as snow. — Better, was leprous as snow, as in Exodus 4:6, where the same words occur; or, a leper (as white), as snow, as in 2 Kings 5:27. In an ordinary case of leprosy, when the disease covered the whole body, and the whole of the flesh had turned white, the man was to be pronounced clean. It was otherwise in cases in which persons were smitten with leprosy by the immediate hand of God, as in the case of Moses and in that of Gehazi.

And Aaron looked upon Miriam... — Or, and Aaron turned towards Miriam — i.e., directed his attention to her, &c. This may have been the first case in which Aaron was required to carry into execution the laws laid down in Leviticus 13:14, respecting the inspection of the leper; and the duties which devolved upon him must have been doubly painful from the fact that the leper stood in a near relationship to himself, and that he had been a participator in the sin which had called for so severe a punishment.