Anti-pelagian Writings by St. Augustine
(25.) Hence the force of the statement: |There was no injustice in my hands, but my prayer was pure.| For the purity of his prayer arose from this circumstance, that it was not improper for him to ask forgiveness in prayer, when he really bestowed forgive
And when he says concerning the Lord, |For many bruises hath He inflicted upon me without a cause,| observe that his words are not, He hath inflicted none with a cause; but, |many without a cause.| For it was not because of his manifold sins that these many bruises were inflicted on him, but in order to make trial of his patience. For on account of his sins, indeed, without which, as he acknowledges in another passage, he was certainly not, he yet judges that he ought to have suffered less.