Numbers 13:28-29

13:28 But the inhabitants are strong, and the cities are fortified and very large. Moreover we saw the descendants of Anak there. 13:29 The Amalekites live in the land of the Negev; the Hittites, Jebusites, and Amorites live in the hill country; and the Canaanites live by the sea and along the banks of the Jordan.”

Numbers 13:32-33

13:32 Then they presented the Israelites with a discouraging report of the land they had investigated, saying, “The land that we passed through to investigate is a land that devours its inhabitants. All the people we saw there are of great stature. 13:33 We even saw the Nephilim there (the descendants of Anak came from the Nephilim), and we seemed liked grasshoppers both to ourselves and to them.”

Deuteronomy 1:28

1:28 What is going to happen to us? Our brothers have drained away our courage by describing people who are more numerous and taller than we are, and great cities whose defenses appear to be as high as heaven itself! Moreover, they said they saw Anakites there.”

Deuteronomy 2:10-11

2:10 (The Emites used to live there, a people as powerful, numerous, and tall as the Anakites. 2:11 These people, as well as the Anakites, are also considered Rephaites; the Moabites call them Emites.

Deuteronomy 3:11

3:11 Only King Og of Bashan was left of the remaining Rephaites. (It is noteworthy that his sarcophagus was made of iron. Does it not, indeed, still remain in Rabbath of the Ammonites? It is thirteen and a half feet long and six feet wide according to standard measure.)

Deuteronomy 9:1-3

Theological Justification of the Conquest

9:1 Listen, Israel: Today you are about to cross the Jordan so you can dispossess the nations there, people greater and stronger than you who live in large cities with extremely high fortifications. 9:2 They include the Anakites, a numerous and tall people whom you know about and of whom it is said, “Who is able to resist the Anakites?” 9:3 Understand today that the Lord your God who goes before you is a devouring fire; he will defeat and subdue them before you. You will dispossess and destroy them quickly just as he has told you.