1 Samuel 9:23

And Samuel said to the cook, "Bring the portion which I gave you," etc. John spoke in his own language, which was accustomed to provide the audience with the food of life, saying: "Preach the power of the singular virtue, which I commanded you to say was given to no pure man." And she, immediately obeying with a prophetic heart, brought forth words suitable solely to divine power and majesty. And she testified that these belonged to the Mediator of men, to the name of Jesus Christ, saying: "He who has the bride is the bridegroom; and he who comes from above is above all" (John 3). And again: "For God does not give the Spirit by measure. The Father loves the Son and has given all things into His hand" (ibid.).

And since great things, and not small ones, are now shown to him to accomplish, it is added: Samuel said to the cook: Give the portion which I gave to you, and which I commanded you to set aside with you. So the cook took up the shoulder and placed it before Saul. And Samuel said: Behold what remains, set it before you and eat, because it was purposely kept for you when I called the people. And Saul ate with Samuel on that day. What is signified by the shoulder of the breast, if not the strength of action? This is bestowed by Samuel's cook, when it is demonstrated to lesser ones by the greatest preachers. For the cooks are priests, because while they speak to the chosen faithful in the fervor of the spirit, they cook the foods of the mind, as it were through fire. But the portion that is given is said to have been set apart, because the strength of good work in a preacher ought to be singular. Saul places this before him, when he commands the one to be ordained as pastor of holy Church to consider how great a strength he ought to possess. But concerning what the cook had set aside, Samuel says to Saul: "Behold that which is left, set it before you." It remained indeed, because Christ did not fulfill all things that are ours; through His cross He indeed redeemed all, but something remained, so that whoever strives to be redeemed and to reign with Him must be crucified. He who said the following had surely seen this remainder: "If we suffer, we shall also reign with Him" (2 Tim. 2:12). As if to say: What Christ fulfilled avails nothing unless one also fulfills that which remained. Hence the blessed apostle Peter says: "Christ also suffered for us, leaving us an example, that ye should follow His steps" (1 Pet. 2:21). Hence Paul says: "I fill up that which is behind of the afflictions of Christ in my flesh" (Col. 1:24).