Origen, on Num 18:20

“And the Lord said to Aaron: You shall possess nothing in their land, neither shall you have a portion among them: I am thy portion and inheritance in the midst of the children of Israel.”

“Indeed, do you wish to know what the difference is between the priests of God and the priests of Pharaoh? Pharaoh grants lands to his priests. The Lord, on the other hand, does not grant his priests a portion in the land but says to them, "I am your portion." You therefore who read these words, observe all the priests of the Lord and notice what difference there is between the priests, lest perhaps they who have a portion in the land and have time for earthly cares and pursuits may appear not so much to be priests of the Lord as priests of Pharaoh. For it is Pharaoh who wishes his priests to have possessions of lands and to work at the cultivation of the soil not of the soul, to give attention to the fields and not to the law. But let us hear what Christ our Lord admonishes his priests: "He who has not renounced all he possesses," he says, "cannot be my disciple."”

Imported from an open dataset — not yet checked against the printed edition.