The people are great and tall, the sons of the Anakim whom you know and about whom you have heard it said, ‘Who can stand up against the sons of Anak?’
“the sons of Anak.” Anak was one of the Nephilim, the “Fallen Ones,” just as Numbers 13:33 says.
[For more on the Nephilim, see commentary on Genesis 6:4.]