Leviticus 22:10

Only a member of a priestly family may eat any of the sacred offerings. No one else may eat them, not even someone staying with a priest or hired by him.

1 Samuel 21:6

The priest gave him holy bread. For he only had the bread of the presence that had been taken from Jehovah's presence and replaced with warm bread that day.

Matthew 12:4

He entered into the house of God, and he and his companions ate the showbread (holy bread), which it was not lawful for them to eat. It was only lawful for the priests.

Exodus 29:33

They shall eat those things used for their atonement and their ordination and consecration. A layman shall not eat them, because they are holy.

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
The priest gave him holy bread. For he only had the bread of the presence that had been taken from Jehovah's presence and replaced with warm bread that day.
Matthew 12:4
He entered into the house of God, and he and his companions ate the showbread (holy bread), which it was not lawful for them to eat. It was only lawful for the priests.

General references

Exodus 12:45
No foreigner visiting you may eat it. No hired worker may eat it.