Numbers 11:26-27

But there remained two of the men in the camp, the name of the one was Eldad, and the name of the other Medad: and the spirit rested upon them; and they were of them that were written, but went not out unto the tabernacle: and they prophesied in the camp.

And there ran a young man, and told Moses, and said, Eldad and Medad do prophesy in the camp.