Part 1
After studying the text in chevruta or as a group, ask for kushiot or difficulties participants find. The kushah that will be explored in Part 2 is "Why do Moshe and Aaron die for hitting the rock? Why was that action so bad?"
Part 2
ובעבור כן לא הכה אלא פעם אחת ויצאו מים רבים אבל בכאן לא. פירש לו כן והסכימו שניהם להכות בצור פעמים והנה זה חטא. ועל כן אמר לא האמנתם בי לשום אמונה בשמי ובאמונה יעשה
Moshe hit the rock and [only] a few drops came out, because of the paucity of his concentration due to his anger. And [Moshe and Aharon] wondered about the thing and both of them agreed to hit the rock a second time - as I mentioned - and that was the sin for both of them. And according to my opinion, the explanation of "and you shall speak to (el) the boulder," is like "about (al) the boulder."