הִנְנִ֣י עֹמֵד֩ לְפָנֶ֨יךָ שָּׁ֥ם ׀ עַֽל־הַצּוּר֮ בְּחֹרֵב֒ וְהִכִּ֣יתָ בַצּ֗וּר וְיָצְא֥וּ מִמֶּ֛נּוּ מַ֖יִם וְשָׁתָ֣ה הָעָ֑ם וַיַּ֤עַשׂ כֵּן֙ מֹשֶׁ֔ה לְעֵינֵ֖י זִקְנֵ֥י יִשְׂרָאֵֽל׃
Behold, I will stand before thee there upon the rock in Horeb; and thou shalt smite the rock, and there shall come water out of it, that the people may drink.’ And Moses did so in the sight of the elders of Israel.
Read kabbalistic (mystical) interpretation of Exodus 17:6: and classical mystical sources.