Then the LORD came down in the cloud and spoke to him, and He took some of the Spirit that was on Moses and placed that Spirit on the seventy elders. As the Spirit rested on them, they prophesied—but they never did so again.
We have here the performance of God's word to Moses, that he should have help in the government of Israel. I. Here is the case of the seventy privy-counsellors in general. Moses, though a little disturbed by the tumult of the people, yet was thoroughly composed by the communion he had with God, and soon came to himself again. And according as the matter was concerted, 1.
Commenting on Numbers 11:24-30
And the Lord came down in a cloud,.... In a cloud of glory, or a glorious one, as the Targums; either in the same that went before the people in the wilderness, or in one distinct from it, and only used on this occasion, as a visible token of the presence of God: and spake unto him; to Moses, talked with him, as he said...
when the spirit rested upon them, they prophesied, and did not cease--As those elders were constituted civil governors, their "prophesying" must be understood as meaning the performance of their civil and sacred duties by the help of those extraordinary endowments they had received; and by their not "ceasing" we understand, either that they continued to exercise their gifts uninterruptedly the first day (see Sa1 19:24)...