1 Kings 19:6-8

Young's Literal Translation

⁶ and he looketh attentively, and lo, at his bolster a cake [baken on] burning stones, and a dish of water, and he eateth, and drinketh, and turneth, and lieth down.

⁷ And the messenger of Jehovah turneth back a second time, and cometh against him, and saith, `Rise, eat, for the way is too great for thee;'

⁸ and he riseth, and eateth, and drinketh, and goeth in the power of that food forty days and forty nights, unto the mount of God -- Horeb.