Kings III 19:8

8 And he arose, and ate and drank, and went in the strength of that meat forty days and forty nights to mount Choreb.

Kings III 19:8 In-Context

6 And Eliu looked, and, behold, at his head there was a cake of meal and a cruse of water; and he arose, and ate and drank, and returned and lay down.
7 And the angel of the Lord returned again, and touched him, and said to him, Arise, and eat, for the journey far from thee.
8 And he arose, and ate and drank, and went in the strength of that meat forty days and forty nights to mount Choreb.
9 And he entered there into a cave, and rested there; and, behold, the word of the Lord to him, and he said, What thou here, Eliu?
10 And Eliu said, I have been very jealous for the Lord Almighty, because the children of Israel have forsaken thee: they have digged down thine altars, and have slain thy prophets with the sword; and I only am left alone, and they seek my life to take it.

The Brenton translation of the Septuagint is in the public domain.