That is what is written: “Behold, all these God will do, twice, three times to a man” (Job 33:29). Three times He waits for a person; if he repents, excellent, and if not, He brings upon him [punishment] for the first ones. Likewise, you find that when the Holy One blessed be He said to Moses: “Go, and I will send you to Pharaoh” (Exodus 3:10), initially he said: “But they will not believe me” (Exodus 4:1), then he said: “I am not a man of words” (Exodus 4:10), then he said: “Please…send by means of whom You will send” (Exodus 4:13). These are three times. Since he did not recant, and said: “Behold, the children of Israel did not heed me” (Exodus 6:12), the divine speech communed with Aaron with him; that is what is written: “The Lord spoke to Moses and to Aaron.”