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 25:30

The table should be placed in front of the Covenant Box. There is always to be the sacred bread offered to me for the table.

Leviticus 24:5-9

Take flour and bake twelve rings of bread. Each ring will contain four quarts of flour.

Exodus 29:32-33

Aaron and his sons shall eat the flesh of the ram and the bread that is in the basket, at the doorway of the tent of meeting.

Leviticus 8:31

Moses told Aaron and his sons: Cook the meat at the entrance to the Tent of Meeting. Take the meat and the bread in the basket of the ordination offering. Eat them there as I commanded when I said: 'Aaron and his sons will eat it.'

Treasury of Scripture Knowledge

Summary

How he entered into the house of God, and did eat the shewbread, which was not lawful for him to eat, neither for them which were with him, but only for the priests?

The shew-bread

Bible References

The shew-bread

Exodus 25:30
The table should be placed in front of the Covenant Box. There is always to be the sacred bread offered to me for the table.
Leviticus 24:5
Take flour and bake twelve rings of bread. Each ring will contain four quarts of flour.

But

Exodus 29:32
Aaron and his sons shall eat the flesh of the ram and the bread that is in the basket, at the doorway of the tent of meeting.
Leviticus 8:31
Moses told Aaron and his sons: Cook the meat at the entrance to the Tent of Meeting. Take the meat and the bread in the basket of the ordination offering. Eat them there as I commanded when I said: 'Aaron and his sons will eat it.'
Leviticus 24:9
The bread will belong to Aaron and his sons. They will eat it in a holy place. It is very holy, set apart from Jehovah's offering by fire. This is a long lasting law.

General references

Exodus 25:30
The table should be placed in front of the Covenant Box. There is always to be the sacred bread offered to me for the table.
Exodus 40:23
He arranged the bread on the table in Jehovah's presence, following Jehovah's instructions.
Leviticus 24:8
Every day of worship (sabbath day) a priest must arrange the bread in Jehovah's presence. It is a long lasting reminder of my promise to the Israelites.