Whosoever stops his ears at the cry of the poor, he also shall cry himself, but shall not be heard.
All Commentaries on Proverbs 21:13 Go To Proverbs 21
Cyprian of Carthage
AD 258
He will not be able to merit the mercy of God who himself has not been merciful, nor will [he] gain any request from the divine love by his prayers who has not been humane toward the prayer of the poor.