Rev 14:14-15
I looked up, I caught my breath! — a white cloud and one like the Son of Man sitting on it. He wore a gold crown and held a sharp sickle. 15 Another Angel came out of the Temple, shouting to the Cloud-Enthroned, "Swing your sickle and reap. It's harvest time. Earth's harvest is ripe for reaping."

Jesus spoke about harvest time!