Of the birds after their kinds, and of the cattle after their kinds, and of every creeping thing of the ground after its kind, two of every kind will come to you so you can keep them alive. ¹ 

The Nephilim ¹  were on the earth in those days (and also after this) ²  when the sons of God were having sexual relations with ³  the daughters of humankind, who gave birth to their children. ⁴  They were the mighty heroes ⁵  of old, the famous men. ⁶