Genesis 6:4-6

4 The Nephilim appeared on earth in those days, as well as later, [3] after the sons of God had intercourse with the daughters of human beings, who bore them sons. They were the heroes of old, the men of renown. [AB]

5 [4] When the Lord saw how great the wickedness of human beings was on earth, and how every desire that their heart conceived was always nothing but evil, [AC]

6 the Lord regretted making human beings on the earth, and his heart was grieved. [5]