וַיֹּ֤אמֶר יְהוָה֙ אֶל־מֹשֶׁ֔ה רְאֵ֛ה נְתַתִּ֥יךָ אֱלֹהִ֖ים לְפַרְעֹ֑ה וְאַהֲרֹ֥ן אָחִ֖יךָ יִהְיֶ֥ה נְבִיאֶֽךָ׃
And the LORD said unto Moses: ‘See, I have set thee in God’s stead to Pharaoh; and Aaron thy brother shall be thy prophet.
Read halakhic rulings (Jewish law) on Exodus 7:1 from the Mishneh Torah and classical halakhic sources, free online.