"Then the Lord came down in the cloud and spoke to him, and took some of the spirit that was on him and put it on the seventy elders; and when the spirit rested upon them, they prophesied. But they did not do so again.
Two men remained in the camp, one named Eldad, and the other named Medad, and the spirit rested on them; they were among those registered, but they had not gone out to the tent, and so they prophesied in the camp. And a young man ran and told Moses, ‘Eldad and Medad are prophesying in the camp.’ And Joshua son of Nun, the assistant of Moses, one of his chosen men, said, ‘My lord Moses, stop them!’ But Moses said to him, ‘Are you jealous for my sake? Would that all the Lord’s people were prophets, and that the Lord would put his spirit on them!’" - Numbers 11:25-29 (NRSV)
I'm glad God's work of salvation is up to the Holy Spirit and not to us.