Genesis 6:2-5

BBE(i) 2 The sons of God saw that the daughters of men were fair; and they took wives for themselves from those who were pleasing to them. 3 And the Lord said, My spirit will not be in man for ever, for he is only flesh; so the days of his life will be a hundred and twenty years. 4 There were men of great strength and size on the earth in those days; and after that, when the sons of God had connection with the daughters of men, they gave birth to children: these were the great men of old days, the men of great name. 5 And the Lord saw that the sin of man was great on the earth, and that all the thoughts of his heart were evil.