1 Pastors are set over the flock, and give the sheep the food of life. Whosoever is watchful, and toils in behalf of his sheep, is careful for his flock, and is the disciple of our Good Shepherd, who gave Himself in behalf of His sheep. And whosoever brings not back his flock carefully, is likened to the hireling who has no care for the sheep. Be like, O Pastors, to those righteous Pastors of old. Jacob fed the sheep of Laban, and guarded them and toiled and was watchful, and so received the reward.
For Jacob said to Laban:— Lo! Twenty years am I with you. Your sheep and your flocks I have not robbed and the males of your sheep I have not eaten. That which was broken I did not bring unto you, but you required it at my hands! In the daytime the heat devoured me and the cold by night. My sleep departed from my eyes. Observe, you Pastors, that Pastor, how he cared for his flock. He used to watch in the night-time to guard it and was vigilant; and he used to toil in the daytime to feed it. As Jacob was a pastor, so Joseph was a pastor and his brethren were pastors. Moses was a pastor, and David also was a pastor. So Amos was a pastor. These all were pastors who fed the sheep and led them well.
Source: Demonstrations (New Advent)