Variantly: "You 'hachilotha'": You provided an opening for me to stand and pray before You for your children when they besmirched themselves with the golden calf, as it is written (Devarim 4:14) "Quit Me, and I shall destroy them." Now was Moses holding on to the Holy One Blessed be He (that He said "Quit Me")? This is what he said before Him (in "hachilotha"): L-rd of the universe, You provided an "opening" (thus, "hachilotha") to stand and pray for Your children (i.e., "Quit Me" implies that if you do not quit Me, but beseech Me), I will not destroy them) — whereupon I stood and prayed for them, and You heard my prayer and forgave their transgression.
I thought (now, in saying "hachilotha"): If I stood up for them in prayer, would they not pray for me (that I enter Eretz Yisrael)? And does this not follow a fortiori, viz.: If the prayer of the one (Moses) for the many is thus heeded, how much more so the prayer of the many for the one!