So he arose, and ate and drank; and he went in the strength of that food forty days and forty nights as far as Horeb, the mountain of God.
1 Kings 19:8
Surrounding context
19:7 And the angel of the LORD came back the second time, and touched him, and said, "Arise and eat, because the journey is too great for you."
19:8 So he arose, and ate and drank; and he went in the strength of that food forty days and forty nights as far as Horeb, the mountain of God.
19:9 And there he went into a cave, and spent the night in that place; and behold, the word of the LORD came to him, and He said to him, "What are you doing here, Elijah?"