Luke 21:27

27Andκαὶthenτότεwill they seeὄψονταιtheτὸνSonυἱὸντοῦof Manἀνθρώπουcomingἐρχόμενονinἐνa cloudνεφέλῃwithμετὰpowerδυνάμεωςandκαὶgloryδόξηςgreatπολλῆς.

And then they will see the Son of Man coming in a cloud with power and great glory.