Rabbi Zadok said: From them were born the giants (Anakim), who walked with pride in their heart, and who stretched forth their hand to all (kinds of) robbery and violence, and shedding of blood, as it is said, "And there we saw the Nephilim, the sons of Anak" (Num. 13:33); and it says, "The Nephilim were on the earth in those days" (Gen. 6:4).
Rabbi Joshua said: || The Israelites are called "Sons of God," as it is said, "Ye are the sons of the Lord your God" (Deut. 14:1). The angels are called "Sons of God," as it is said, "When the morning stars sang together, and all the sons of God shouted for joy" (Job 38:7); and whilst they were still in their holy place in heaven, these were called "Sons of God," as it is said, "And also after that, when the sons of God came in unto the daughters of men, and they bare children to them; the same became the mighty men, which were of old, men of renown" (Gen. 6:4).