1 Kings 19:8

And he was there with the Lord forty days and forty nights; he did neither eat bread, nor drink water. And he wrote upon the tables the words of the covenant, the ten commandments.

And I fell down before the Lord, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which ye sinned, in doing wickedly in the sight of the Lord, to provoke him to anger.

And Moses went into the midst of the cloud, and gat him up into the mount: and Moses was in the mount forty days and forty nights.

Now Moses kept the flock of Jethro his father in law, the priest of Midian: and he led the flock to the backside of the desert, and came to the mountain of God, even to Horeb.

And when he had fasted forty days and forty nights, he was afterward an hungred.

And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me.

Being forty days tempted of the devil. And in those days he did eat nothing: and when they were ended, he afterward hungered.

And he was there in the wilderness forty days, tempted of Satan; and was with the wild beasts; and the angels ministered unto him.

And at the end of ten days their countenances appeared fairer and fatter in flesh than all the children which did eat the portion of the king’s meat.

When I was gone up into the mount to receive the tables of stone, even the tables of the covenant which the Lord made with you, then I abode in the mount forty days and forty nights, I neither did eat bread nor drink water: And the Lord delivered unto me two tables of stone written with the finger of God; and on them was written according to all the words, which the Lord spake with you in the mount out of the midst of the fire in the day of the assembly. And it came to pass at the end of forty days and forty nights, that the Lord gave me the two tables of stone, even the tables of the covenant.

And mount Sinai was altogether on a smoke, because the Lord descended upon it in fire: and the smoke thereof ascended as the smoke of a furnace, and the whole mount quaked greatly.

Remember ye the law of Moses my servant, which I commanded unto him in Horeb for all Israel, with the statutes and judgments. Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the Lord: