'Plow' in the Bible

But Jesus said to him, “No one who puts his hand to the plow and looks back is fit for the kingdom of God.”

"Then the servant manager told himself, "What should I do? My master is taking my position away from me. I'm not strong enough to plow, and I'm ashamed to beg.

Or saith he it altogether for our sakes? For our sakes, no doubt, this is written: that he that ploweth should plow in hope; and that he that thresheth in hope should be partaker of his hope.