Genesis 6

Human wickedness proliferates on earth, causing YHWH to regret creating mankind; Noach, righteous and blameless, finds favor with YHWH, who instructs him to build a teivah (ark) as corruption fills the earth and the Nephilim appear from unions of Bnei haElohim and women's daughters.

Interlinear Text

The Nephilim were on the earth in those days those and also after that when came sons God to daughters mankind and they bore to them they the mighty men who from of old men of renown