The Forty-Day Fasts
Throughout all of Bible History, there are only three people who are recorded to have done a forty-day fast - Jesus Christ, Moses and Elijah. The events, and those three men, despite their living centuries apart, have strong connections in that both Moses and Elijah did or completed their forty-day fasts at Mount Sinai (also known as Mount Horeb), both Moses and Elijah were sheltered in the rock of Mount Sinai (not coincidentally, see Rock Of Ages) during their stay on the mountain, and then only Moses and Elijah appeared with Jesus Christ in The Transfiguration, after His forty-day fast and His overcoming of Satan "on a very high mountain" (Matthew 4:8).
"And he was there with The Lord forty days and forty nights; he neither ate bread nor drank water. And he wrote upon the tables the words of the covenant, The Ten Commandments [see also The Ten Commandments Now?]. When Moses came down from Mount Sinai [shown in the photograph], with the two tables of the testimony in his hand as he came down from the mountain, Moses did not know that the skin of his face shone because he had been talking with God." (Exodus 34:28-29 RSV)
"And the angel of The Lord came again a second time, and touched him, and said, "Arise and eat, else the journey will be too great for you." And he arose, and ate and drank, and went in the strength of that food forty days and forty nights to Horeb the mount of God. And there he came to a cave, and lodged there" (1 Kings 19:7-9 RSV)
"Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil. And He fasted forty days and forty nights, and afterward He was hungry. And the tempter came and said to Him, "If you are the Son of God, command these stones to become loaves of bread." But He answered, "It is written, 'Man shall not live by bread alone, but by every word that proceeds from the mouth of God.'"
Then the devil took Him to the holy city, and set Him on the pinnacle of the Temple, and said to Him, "If you are the Son of God, throw Yourself down; for it is written, 'He will give His angels charge of You,' and 'On their hands they will bear You up, lest you strike Your foot against a stone.'" Jesus said to him, "Again it is written, 'You shall not tempt The Lord your God.'"
"Again, the devil took Him to a very high mountain, and showed Him all the kingdoms of the world and the glory of them; and he said to Him, "All these I will give you, if You will fall down and worship me." Then Jesus said to him, "Begone, Satan! for it is written, 'You shall worship The Lord your God and Him only shall you serve.'" Then the devil left him [see What Satan Fears Most], and behold, angels came and ministered to Him." (Matthew 4:1-11 RSV)
Fact Finder: Are Moses and Elijah the prime representatives of God's Law and prophets?
See Why Elijah?