Pope Gregory the Great (6th Century)

"It is by no means enough not to steal the property of others; you are in error if you keep to yourself the wealth which God has created for all. He who does not give to others what he possesses is a murderer, a killer; when he keeps for his own use what would provide for the poor, one can say that he is slaying all those who could have lived from his plenty; when we share with those who are suffering, we do not give what belongs to us, but what belongs to them. This is not an act of pity, but the payment of a debt."