Athanasius of Alexandria

But our Saviour is so gentle that He teaches thus, "If any man wills to come after Me," and, "Whoever wills to be My disciple;" and coming to each He does not force them, but knocks at the door and says, "Open unto Me, My sister, My spouse;" and if they open to Him, He enters in, but if they delay and will not, He departs from them. For the truth is not preached with swords or with darts, nor by means of soldiers; but by persuasion and counsel. But what persuasion is there where fear of the Emperor prevails? …

History Of The Arians 4.33 ↗

Cyprian

But what great and wonderful and Christian patience is to be found in David from whom Christ descended according to the flesh! David often had the opportunity to kill King Saul, his persecutor, who was eager to destroy him. Yet when Saul was subject to him and in his power, David preferred to save his life and did not retaliate on his enemy but, on the contrary, even avenged him when he was killed. …

Treatise IX. On the Advantage of Patience 10 ↗

Bede

And Abisai said to David: God has delivered your enemy into your hand today, etc. The disciples, now endowed with spiritual faith, understood that all things were given into the hands of the Savior by the Father; but still hindered by carnal ignorance, they thought that the proud and despisers of his word should be sought to be devoured by fire sent from heaven. …

Commentary on Samuel ↗