Num 18:20-24 And the LORD said to Aaron, “You shall have no inheritance in their land, neither shall you have any portion among them. I am your portion and your inheritance among the people of Israel. “To the Levites I have given every tithe in Israel for an inheritance, in return for their service that they do, their service in the tent of meeting, so that the people of Israel do not come near the tent of meeting, lest they bear sin and die. But the Levites shall do the service of the tent of meeting, and they shall bear their iniquity. It shall be a perpetual statute throughout your generations, and among the people of Israel they shall have no inheritance. For the tithe of the people of Israel, which they present as a contribution to the LORD, I have given to the Levites for an inheritance. Therefore I have said of them that they shall have no inheritance among the people of Israel.”
Deuteronomy 10:9 Therefore Levi has no portion or inheritance with his brothers. The LORD is his inheritance, as the LORD your God said to him.
Deuteronomy 14:29 And the Levite, because he has no portion or inheritance with you, and the sojourner, the fatherless, and the widow, who are within your towns, shall come and eat and be filled, that the LORD your
Joshua 14:3 but to the Levites he gave no inheritance among them.
Joshua 13:14 To the tribe of Levi alone Moses gave no inheritance. The offerings by fire to the LORD God of Israel are their inheritance, as he said to him.
Psalms 73:26 My flesh and my heart may fail, but God is the strength of my heart and my portion forever.
You shall not have a distinct and separate portion of land, as the other tribes shall. The reason of this law was, partly, because God would have them wholly devoted to and employed in his service, and therefore; free from worldly encumbrances and businesses; partly, because God had abundantly provided for them otherwise by tithes and first-fruits and oblations of all sorts; partly, because God would have their worldly comfort and happiness depend singly upon him and his service, and so would; oblige them to use more zeal and diligence in the advancement of piety, even for their own interest, which was either better or worse as true religion flourished or decayed; see Judges 17:9,10 19:18 2 Chronicles 13:9 30:22 31:4; partly, that this might be a firm bond of hearty love and affection between the people and their teachers, the Levites, who, as they performed religious services for the people, so they received their subsistence from them; and partly, that by this means being dispersed among the several tribes, they might have the better opportunity for teaching and watching over the people, which was their duty, Deu 33:10 2 Chronicles 30:22 Malachi 2:4-7. (Poole)
God was necessarily to be regarded as the greatest possession of all, beyond which nothing greater is conceivable, and in comparison with which every other possession is to be regarded as nothing. Hence it was evidently the greatest privilege and highest honour to have Him for a portion and possession, “he who possesses God possesses all things; and the worship (cultus) of Him is infinitely fuller of delight, and far more productive. (Keil)