Matthew 24:39

39Andκαὶnotοὐκthey knewἔγνωσανuntilἕωςcameἦλθενtheὁfloodκατακλυσμὸςandκαὶtook awayἦρενallἅπαντας,thusοὕτωςwill beἔσταιalsoκαὶtheἡcomingπαρουσίαof theτοῦSonυἱοῦτοῦof Manἀνθρώπου.

And they did not know until the flood came and took away all. So also will be the coming of the Son of Man.