A vine has large and small clusters of grapes, and the larger cluster hangs down lower than the smaller. So it is among Israel. The greater the man, the more humble he is. (Midrash Vayikrah Rabbah 36:2)
“I appeared to Abraham, to Isaac, and to Jacob…” (Exodus 6:3). This seems to be a very straightforward and unambiguous statement by God to Moses.