Bible: Genesis 6:3-4

6:3 So the Lord said, “My spirit will not remain in 1  humankind indefinitely, 2  since 3  they 4  are mortal. 5  They 6  will remain for 120 more years.” 7 

6:4 The Nephilim 8  were on the earth in those days (and also after this) 9  when the sons of God were having sexual relations with 10  the daughters of humankind, who gave birth to their children. 11  They were the mighty heroes 12  of old, the famous men. 13 

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