Something like those mazzoth: it's that sort of bread: unleavened shewbread.

In Solomon's Temple, there was provision made for the proper exhibition of the shewbread.

A specially "pure" kind, lebhonah zakkah, was presented with the shewbread (Leviticus 24:7).

So, as the disciples walk through a cornfield and, being hungry, eat the corn, there and then, it must mean 'Second Sabbath following the first day of the shewbread.'

I felt I was floating in air, borne up by the beauty of it, looking down upon the altar, down into the cup of crimson wine, down upon shewbread and antique knife.

A golden altar for incense still smoldered, releasing the fragrant smell of frankincense, and another altar for shewbread (holy bread) sat undisturbed with twelve sheets of unleavened bread laid out in rows.

The Bible ascribes a specific religious function to the Kohathites, namely care of the vessels and objects within the sanctuary - the Ark of the Covenant, Menorah, Table of Shewbread, etc.