Numbers 13:28-33

But the people who live in the land are strong, and the cities are fortified (walled) and very large; moreover, we saw there the descendants of Anak [people of great stature and courage]. [The people descended from] Amalek live in the land of the Negev (South country); the Hittite, the Jebusite, and the Amorite live in the hill country; and the Canaanites live by the [Dead] Sea and along the side of the Jordan.” Then Caleb quieted the people before Moses, and said, “Let us go up at once and take possession of it; for we will certainly conquer it.” 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.”