The Priests kept their land

(18) And when that year was ended, they came to him the next year and said to him, “We cannot hide from my lord that, with all the money and animal stocks consigned to my lord, nothing is left at my lord’s disposal save our persons and our farmland. (19) Let us not perish before your eyes, both we and our land. Take us and our land in exchange for bread, and we with our land will be serfs to Pharaoh; provide the seed, that we may live and not die, and that the land may not become a waste.” (20) So Joseph gained possession of all the farm land of Egypt for Pharaoh, every Egyptian having sold his field because the famine was too much for them; thus the land passed over to Pharaoh. (21) And he removed the population town by town, from one end of Egypt’s border to the other. (22) Only the land of the priests he did not take over, for the priests had an allotment from Pharaoh, and they lived off the allotment which Pharaoh had made to them; therefore they did not sell their land.

(1) רק אדמת הכהנים, “only the soil belonging to the priests (Joseph did not transfer to Pharaoh).” They therefore would not have any reason to start a rebellion against Pharaoh.

(22) Only the land of the priests he bought not because they had considered him innocent at the time when his master was seeking to put him to death, and they had delivered him from the judgment of death: and besides he had said that a portion should be given them from Pharoh. So they ate the portion which Pharoh gave them, and sold not their land.

(1) רק אדמת הכהנים, “only the soil belonging to the priests ... A different reason given for Joseph’s preferential treatment of the priests is as we explained already, that the priests had suggested a method by which to test if Joseph or the wife of Potiphar had spoken the truth, as a result of which, Joseph instead of being hanged had only been put in ;jail.

(1) רק אדמת הכהנים, “only the land-holdings of the priests, etc.” ... Other commentators attribute Joseph’s showing preference to the priests to the tradition that it had been the priests who had to sit in judgment deciding if the accusation of Potiphar’s wife that Joseph had attempted to rape her was true or not had ruled in Joseph’s favour basing themselves on the manner in which his garments had been torn. Had the tears occurred in the frontal part of the garments this would have been incriminating. The fact that the tears were in the rear indicated to them that Joseph had fled from her and not vice versa. ...

(5) רק אדמת הכהנים לא קנה . Gratitude is a virtue which must be practiced even with pagans. The Egyptian clergy had saved Joseph when he was brought to trial before them accused of the attempted rape of Potiphar's wife. When these clergymen realized that the tear in the garment Joseph left behind was in the front, they realized that Joseph was innocent [based on ספר הישר Ed.] As a result, Joseph now repaid them in kind.

(1) רק אדמת הכהנים, “only the land-holdings of the priests, etc.” Some commentators believe that Joseph favoured the priests because his former master Potiphar was now a priest in the monastery of On. ...