'Winnowed' in the Bible

"But, next, the man who had the one talent in his keeping came and said, "'Sir, I knew you to be a severe man, reaping where you had not sown and garnering what you had not winnowed.

"'You wicked and slothful servant,' replied his master, 'did you know that I reap where I have not sown, and garner what I have not winnowed?