Midrash su Esodo 40:3

We are taught in a Baraitha that R. Eliezer b. Jacob says: "It is impossible to say that the tribe of Levites was standing below the mountain, for there is another passage which states that they (the Levites) were upon the mountain; and again it is impossible to say that they were upon the mountain, since there is another passage which asserts that they were standing below the mountain. How are both facts possible? We must therefore say that the elders of the priesthood and of the Levites were below the mountain, but the rest [the younger element of it] were upon the mountain." R. Joshua says: "This means, whoever was capable of doing Levitical services [between thirty and fifty years] were below the mountain, but the rest were upon the mountain." Rabbi, however, says: "Both, the Israelites and the Levites stood below the mountain. Turning their faces towards Mt. Gerizim, they began with the blessings. Afterwards [they turned their faces] towards Mt. Ebal, and began the curses, and the word Al used in the text (Deut. 27, 13) does not mean upon, but nearby." You maintain that the word Al means nearby, perhaps it means upon? But since we find another passage (Ex. 40, 3) And thou shall separate the ark with the veil, where the word, Al is used, for nearby, hence here also does the word Al mean nearby.

An idolater asked Rabban Gamliel, "Why was the Holy One, Blessed be He revealed to Moses in the Burning Bush?" Rabban Gamliel replied to him, "If God had been revealed in a carob tree or a fig tree, you would have asked me the same thing, and I could not send you away without an answer. This teaches you that there is no place in the world devoid of the Shekhinah."