c. 198–203 · Clement of Alexandria, The Stromata, or Miscellanies 2.18
The Lord enjoins to ease and raise up the beasts of enemies when labouring beneath their burdens; remotely teaching us not to indulge in joy at our neighbour’s ills, or exult over our enemies; in order to teach those who are trained in these things to pray for their enemies. For He does not allow us either to grieve at our neighbour’s good, or to reap joy at our neighbour’s ill. And if you find any enemy’s beast straying, you are to pass over the incentives of difference, and take it back and restore it. For oblivion of injuries is followed by goodness, and the latter by dissolution of enmity. From this we are fitted for agreement, and this conducts to felicity.