Numbers 13:22, 28, 33

When they had gone up into the Negev, they came to Hebron where Ahiman, Sheshai and Talmai, the descendants of Anak were. (Now Hebron was built seven years before Zoan in Egypt.)

Nevertheless, the people who live in the land are strong, and the cities are fortified and very large; and moreover, we saw the descendants of Anak there.

There also we saw the Nephilim (the sons of Anak are part of the Nephilim); and we became like grasshoppers in our own sight, and so we were in their sight.”