en_tn/1co/10/18.md

the Israel that is according to the flesh

This refers to people who belonged to Israel because they were descendants of Israel. Alternate translation: "the natural Israel" or "the physical Israel" or "the people of Israel"

Are not those who eat the sacrifices participants in the altar?

Paul uses a question to remind the Corinthians of what they already know so that he can give them new information. Alternate translation: "Those who eat the sacrifices share in the activities and the blessings of the altar." (See: rc://en/ta/man/jit/figs-rquestion)