And the cloud departed from off the {f} tabernacle; and, behold, Miriam became leprous, white as snow: and Aaron looked upon Miriam, and, behold, she was leprous.

(f) From the door of the tabernacle.

Wesley's Notes

12:10 From the tabernacle - Not from the whole tabernacle, but from that part, whither it was come, to that part which was directly over the mercy - seat, where it constantly abode. Leprous - She, and not Aaron, either because she was chief in the transgression or because God would not have his worship interrupted or dishonoured, which it must have been if Aaron had been leprous. White - This kind of leprosy was the most virulent and incurable of all. It is true, when the leprosy began in a particular part, and thence spread itself over all the flesh by degrees, and at last made it all white, that was an evidence of the cure of the leprosy, Lev 13:12,13. But it was otherwise when one was suddenly smitten with this universal whiteness.

Jamieson-Fausset-Brown Bible Commentary

Nu 12:10-16. Miriam's Leprosy.

10. the cloud departed from the tabernacle-that is, from the door to resume its permanent position over the mercy seat.

Miriam became leprous-This malady in its most malignant form (Ex 4:6; 2Ki 5:27) as its color, combined with its sudden appearance, proved, was inflicted as a divine judgment; and she was made the victim, either because of her extreme violence or because the leprosy on Aaron would have interrupted or dishonored the holy service.

Matthew Henry's Concise Commentary

12:10-16 The cloud departed, and Miriam became leprous. When God goes, evil comes: expect no good when God departs. Her foul tongue, as Bishop Hall says, was justly punished with a foul face. Aaron, as priest, was judge of the leprosy. He could not pronounce her leprous without trembling, knowing himself to be equally guilty. But if she was thus punished for speaking against Moses, what will become of those who sin against Christ? Aaron, who joined his sister in speaking against Moses, is forced for himself and his sister, to beseech him, and to speak highly of him whom he had so lately blamed. Those who trample upon the saints and servants of God, will one day be glad to make court to them. It is well when rebukes produce confession of sin and repentance. Such offenders, though corrected and disgraced, shall be pardoned. Moses made it appear, that he forgave the injury done him. To this pattern of Moses, and that of our Saviour, who said, Father, forgive them, we must conform. A reason is given for Miriam's being put out of the camp for seven days; because thus she ought to accept the punishment of her sin. When under the tokens of God's displeasure for sin, it becomes us to take shame to ourselves. This hindered the people's progress in their march forward towards Canaan. Many things oppose us, but nothing so hinders us in the way to heaven, as sin.