In Context

2 the sons of God saw that the daughters of men were beautiful, and they married any of them they chose.

3 Then the Lord said, "My Spirit will not contend with man forever, for he is mortal ; his days will be a hundred and twenty years."

4 The Nephilim were on the earth in those days-and also afterward-when the sons of God went to the daughters of men and had children by them. They were the heroes of old, men of renown.

5 The Lord saw how great man's wickedness on the earth had become, and that every inclination of the thoughts of his heart was only evil all the time.

6 The Lord was grieved that he had made man on the earth, and his heart was filled with pain.

7 So the Lord said, "I will wipe mankind, whom I have created, from the face of the earth-men and animals, and creatures that move along the ground, and birds of the air-for I am grieved that I have made them."

Genesis 6:5 in Other Translations