Leviticus 22:10

No outside person may take of the holy food, or one living as a guest in the priest's house, or a servant working for payment.

1 Samuel 21:6

So the priest gave him the holy bread: there was no other, only the holy bread which had been taken from before the Lord, so that new bread might be put in its place on the day when it was taken away.

Matthew 12:4

How he went into the house of God and took for food the holy bread which it was not right for him or for those who were with him to take, but only for the priests?

Exodus 29:33

All those things which were used as offerings to take away sin, and to make them holy to be priests, they may have for food: but no one who is not a priest may have them, for they are holy food.

Treasury of Scripture Knowledge

Summary

There shall no stranger eat of the holy thing: a sojourner of the priest, or an hired servant, shall not eat of the holy thing.

The word zar, a stranger, does not mean one of another nation, a foreigner, which is expressed by hechar, but one who is not of the seed of aaron, or does not belong to his family

General references

Bible References

The word zar, a stranger, does not mean one of another nation, a foreigner, which is expressed by hechar, but one who is not of the seed of aaron, or does not belong to his family

1 Samuel 21:6
So the priest gave him the holy bread: there was no other, only the holy bread which had been taken from before the Lord, so that new bread might be put in its place on the day when it was taken away.
Matthew 12:4
How he went into the house of God and took for food the holy bread which it was not right for him or for those who were with him to take, but only for the priests?

General references

Exodus 12:45
A man from a strange country living among you, and a servant working for payment, may not take part in it.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain