They would certainly not have escaped from the hands of the giants, had not Moses given them two weapons against them, his staff and the secret of the Divine Name. These two brought them salvation whenever they felt they were in danger from the giants. For these were none other than the seed of the angels fallen in the antediluvian era. Sprung from their union with the daughters of men, and being half angels, half men, these giants were only half mortal.
They lived very long, and then half their body withered away. Threatened by an eternal continuance of this condition, half life, and half death, they preferred either to plunge into the sea, or by magic herb which they knew to put an end to their existence. They were furthermore of such enormous size that the spies, listening one day while the giants discussed them, heard them say, pointing to the Israelites: "There are grasshoppers by the trees that have the semblance of men," for "so they were in their sight."