Deuteronomy 3:5
All of these cities were fortified by high walls, gates, and locking bars; in addition there were a great many open villages.
Numbers 13:28
But the inhabitants are strong, and the cities are fortified and very large. Moreover we saw the descendants of Anak there.
Deuteronomy 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."
Hebrews 11:30
By faith the walls of Jericho fell after the people marched around them for seven days.