Numbers 11:16, 24-25

So the LORD said to Moses: “Gather to Me seventy men of the elders of Israel, whom you know to be the elders of the people and officers over them; bring them to the tabernacle of meeting, that they may stand there with you.

So Moses went out and told the people the words of the LORD, and he gathered the seventy men of the elders of the people and placed them around the tabernacle. Then the LORD came down in the cloud, and spoke to him, and took of the Spirit that was upon him, and placed the same upon the seventy elders; and it happened, when the Spirit rested upon them, that they prophesied, although they never did so again.