Vulg. 1 Kgs 19:8

Qui cum surrexisset, comedit et bibit, et ambulavit in fortitudine cibi illius quadraginta diebus et quadraginta noctibus usque ad montem Dei Horeb.

And he arose, and ate and drank, and walked in the strength of that food forty days and forty nights, unto the mount of God, Horeb.