"Speak to Aaron, saying, 'No man of your offspring throughout their generations who has a defect shall approach to offer the food of his God." (Leviticus 21:17)
"They shall be joined with you and attend to the obligations of the tent of meeting, for all the service of the tent; but an outsider may not come near you." (Numbers 18:4)
"hen the LORD said to Moses, 'Speak to the priests, the sons of Aaron, and say to them: 'No one shall defile himself for a dead person among his people," (Leviticus 21:1)