Bede the Venerable
Catena Aurea · Lukasevangelium 22
And the Lord said, Simon, Simon, behold, Satan hath desired to have you, that he may sift you as wheat: But I have prayed for thee, that thy faith fail not: and when thou art converted, strengthen thy brethren. And he said unto him, Lord, I am ready to go with thee, both into prison, and to death. And he said, I tell thee, Peter, the cock shall not crow this day, before that thou shalt thrice deny that thou knowest me.
Lest the eleven should be boastful, and impute it to their own strength, that they almost alone among so many thousands of the Jews were said to have continued with our Lord in His temptations, He shews them, that if they had not been protected by the aid of their Master succouring them, they would have been beaten down by the same storm as the rest. Hence it follows, And the Lord said unto Simon, Simon, behold, Satan hath desired thee, that he may sift thee as wheat. That is, he hath longed to tempt you and to shake you, as he who cleanses wheat by winnowing. Wherein He teaches that no man’s faith is tried unless God permits it.