Exodus 24:18

24:18 Moses went into the cloud when he went up the mountain, and Moses was on the mountain forty days and forty nights.

Deuteronomy 9:9

9:9 When I went up the mountain to receive the stone tablets, the tablets of the covenant that the Lord made with you, I remained there forty days and nights, eating and drinking nothing.

Deuteronomy 9:18

9:18 Then I again fell down before the Lord for forty days and nights; I ate and drank nothing because of all the sin you had committed, doing such evil before the Lord as to enrage him.

Deuteronomy 9:25

Moses’ Plea on Behalf of the Lord’s Reputation

9:25 I lay flat on the ground before the Lord for forty days and nights, for he had said he would destroy you.