en_tn_condensed/1co/09/05.md

Do we not have the right to take along with us a sister wife, as do the rest of the apostles, and the brothers of the Lord, and Cephas?

Paul uses a rhetorical question to challenge what some people think about him and Barnabas. Alternate translation: "We have the right to bring a sister wife along with us, just like the rest of the apostles, the brothers of the Lord, and Cephas." (See: rc://en/ta/man/translate/figs-rquestion)

sister wife

"a wife who is a believer" or "a Christian wife." This in no way implies that any of the men has more than one wife.