Some of their Kohathite brothers were responsible for preparing the rows of the showbread every Sabbath.

Matthew 12:4
He entered the house of God, and he and his companions ate the consecrated bread, which was not lawful for them to eat, but only for the priests.

Leviticus 24:5
You are also to take fine flour and bake twelve loaves, using two-tenths of an ephah for each loaf,

Numbers 3:27
From Kohath came the clans of the Amramites, the Izharites, the Hebronites, and the Uzzielites; these were the clans of the Kohathites.

And other of their brothers, of the sons of the Kohathites, were over the show bread, to prepare it every sabbath.