Exodus 34:28

And he wrote upon the tables— To try the patience of the people, Moses was detained a second time for forty days and forty nights in the mount with the Lord; where he, (i.e. the Lord; see Exodus 34:1 and Deuteronomy 10:4.) renewing his covenant with the people, wrote upon the tables the ten commandments as before. Respecting this very long and extraordinary fast of Moses, all that need be said is, that the God who so universally sustains the human frame by the means of food, certainly can, and in the case of Moses certainly did, sustain that human frame without any animal support, by his own immediate and sole influence. See Matthew 4:4.