Thematic Bible: Water brought from the rock

Then said Yahweh unto Moses - Pass over before the people, and take with thee some of the elders of Israel, - thy staff also wherewith thou didst smite the river, take thou in thy hand, so shalt thou go thy way. Behold me! standing before thee, there upon the rock in Horeb, then shalt thou smite the rock and there shall come forth therefrom water, and the people shall drink. And Moses did so, in the sight of the elders of Israel.