Genesis 6:4-6

21st Century King James Version

⁴ There were giants on the earth in those days; and also after that, when the sons of God came in unto the daughters of men and they bore children to them, the same became mighty men who were of old, men of renown.

⁵ And God saw that the wickedness of man was great in the earth, and that every imagining of the thoughts of his heart was only evil continually.

⁶ And the Lord repented that He had made man on the earth, and it grieved Him in His heart.