Revelation 14:16

So He who sat on the cloud thrust in His sickle on the earth, and the earth was reaped.

Numbers 9:16 So it was always:  the cloud covered it by day, and the appearance of fire by night.

John 4:35  Do you not say, ‘There are still four months and then comes the harvest?  Behold, I say to you, lift up your eyes and look at the fields, for they are already white for harvest!