In Genesis 18-19, angels not only acted as the executors of God's wrath against the cities of the plain, but they delivered Lot from danger; in Exodus 32:34, God said to Moses: "my angel shall go before thee. " At a much later period, we have the story of Tobias, which might serve for a commentary on the words of Psalm 91:11: "For He will command His angels concerning you to guard you in all your ways;" (Cf. Psalm 33:8 and 34:5)