Deuteronomy 10:8-9

8At that time, the Lord chose the tribe of Levi to carry the Lord's Covenant Box. He chose them to be his special servants. They had to pray for the Lord to bless his people. They still do these things today.

9That is why the Levites did not receive any land for themselves, as the other tribes did. The Lord himself would give them everything that they needed, as he had promised.)