When men began to multiply on the face of the ground, and daughters were born to them,
the sons of God saw that the daughters of men were fair; and they took to wife such of them as they chose.
Then the LORD said, "My spirit shall not abide in man for ever, for he is flesh, but his days shall be a hundred and twenty years."
The Nephilim were on the earth in those days, and also afterward, when the sons of God came in to the daughters of men, and they bore children to them. These were the mighty men that were of old, the men of renown.
The LORD saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually.
And the LORD was sorry that he had made man on the earth, and it grieved him to his heart.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)