'Harvest' in the Bible

Say not ye, There are yet four months, and then cometh harvest? behold, I say unto you, Lift up your eyes, and look on the fields; for they are white already to harvest.

I have sent you to harvest what you have not worked for. Others have worked, and you have adopted their work as your own."

I assure you and most solemnly say to you, unless a grain of wheat falls into the earth and dies, it remains alone [just one grain, never more]. But if it dies, it produces much grain and yields a harvest.