ויאמר משה אל ד'... לא איש דברים אנכי גם מתמול גם משלשם גם מאז דברך אל עבדך
Rashi notes that this was the seventh day of Moshe Rabbeinu’s dialogue with Hashem. Moshe’s reluctance to assume the leadership of Klal Yisrael was because he did not want to arrogate himself over his older brother, Aharon, who was a Navi, Prophet, and the present leader of the people. The Yalkut Shimoni quotes Moshe, “Until I stood here, my brother, Aharon, had been prophesizing for the last eighty years. Now I should come into his perimeter? I should be his adversary and cause him pain?” Hashem replied, “You will neither be his adversary, nor will you cause him pain. Indeed,…