They must be holy to their God and not profane the name of their God. Because they present to the LORD the food offerings, the food of their God, they must be holy.
KJV
They shall be holy unto their God, and not profane the name of their God: for the offerings of the LORD made by fire, [and] the bread of their God, they do offer: therefore they shall be holy.
ASV
They shall be holy unto their God, and not profane the name of their God; for the offerings of Jehovah made by fire, the bread of their God, they do offer: therefore they shall be holy.