V.1-8 The priests and the Levites, were not going to have any inheritance in the promised land. The Lord was their inheritance. Now from 1 Peter 2:5 we learn that we believers are all priests. The Lord is our inheritance. Although the Levites are not prominent in Deuteronomy, they were carefully provided for by the Lord. When the people brought a “peace offering” to God, they offered it all. Verse 1 tells us that what was given to God, the Levites could eat. This tells us how intimately they were connected with the Lord. Eating, in the scriptures usually means close association with another person. So if the people were faithful in bringing their offerings to God the Levites had food to eat. If the Lord was neglected, so were the Levites.
V.9-14 The people are plainly warned against having anything to do with Spiritism (familiar spirits). Today, the believer needs to be warned against the reading of the monthly horoscope. It is dangerous. People are turning away from God. Speaking in tongues is close to this. It is becoming more difficult to distinguish between the work of God and the work of Satan.