Pseudo-Chrysostom — as excerpted in the Catena Aurea on Mark 2:23-28

“(Vict. Ant. e Cat. in Marc.) The disciples of Christ, freed from the figure, and united to the truth, do not keep the figurative feast of the sabbath, wherefore it is said, And it came to pass, that he went through the corn fields on the sabbath day; and his disciples began, as they went, to pluck the ears of corn.”