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. In short, many prophets have been killed, many martyrs have been honored with glorious deaths, and all have attained their heavenly crowns through the merit of patience, for a crown for sorrow and suffering cannot be obtained unless patience in sorrow and suffering precede.