'Only those that are clean in thine house shall eat of it.' What does that mean?
Numbers 18:11 (NET Bible)
11 “And this is yours: the raised offering of their gift, along with
all the wave offerings of the Israelites. I have given them to you and
to your sons and daughters with you as a perpetual ordinance. Everyone
who is ceremonially clean in your household may eat of it."
Responsibilities of the Priests- Levites. The priests were required to keep high standards of personal cleanliness and moral standards, only those that were ceremoniously clean could eat of the offerings. Regulations for the Eating of Priestly Stipends. Read, Leviticus 22:1-9. 4-6 noted below.
Leviticus 22:4-6 (NET Bible)
4 "No man from the descendants of Aaron who is diseased or has a
discharge may eat the holy offerings until he becomes clean. The one
who touches anything made unclean by contact with a dead person, or a
man who has a seminal emission, 5 or a man who touches a swarming
thing by which he becomes unclean, or touches a person by which he
becomes unclean, whatever that person’s impurity— 6 the person who
touches any of these will be unclean until evening and must not eat
from the holy offerings unless he has bathed his body in water."