Theophylact of Ohrid

They, he says, were established only for the people of that time and are connected with instructions concerning foods and drinks. Eat this, but do not eat that. Why did he say "drinks"? For the law said nothing about distinctions in drinks. He says this either concerning the priest, that he must not drink wine when he intends to enter the sanctuary; or concerning those who had made vows, that is, promises of abstinence from wine, such as the Nazirites; or he said this simply with the aim of devaluing and diminishing these ordinances. …

Commentary on Hebrews ↗

Oecumenius

"only." By hyperbaton [ὑπερβατὸν], the word imposed is to be joined: "in foods and drinks." The sacrifices and worship offered, he says, could not render anyone perfect concerning the soul, but only had power regarding the flesh and carnal matters: and in this, they satisfied the offerers so that they would eat this and not eat that, and that they would be washed with water those who had communicated, or were made common and unclean; which are the justifications of the flesh, that is, purifying the flesh, and not at all the soul; not …

The Pseudo-Oecumenian Catena on Hebrews ↗

Thomas Aquinas

432. – But why did they not cleanse the conscience? Because they consisted only in food and drink. But that which is altogether corporeal does not cleanse the soul, because it does not act on the soul. He says, therefore, in food and drink, i.e., in distinguishing meats and drinks that were forbidden in the Old Law, because abstaining from these does not cleanse the conscience; or else this refers to the use of the sacrifices, because the priests ate what was offered for sins. …

Commentary on Hebrews ↗