Numbers 13:31-33

But the men who had gone up with him said, “We are not able to go up against the people [of Canaan], for they are too strong for us.” So they gave the Israelites a bad report about the land which they had spied out, saying, “The land through which we went, in spying it out, is a land that devours its inhabitants. And all the people that we saw in it are men of great stature. There we saw the Nephilim (the sons of Anak are part of the Nephilim); and we were like grasshoppers in our own sight, and so we were in their sight.”