Parallel
1 Corinthians 15:11
Patriarchal Greek New Testament (1904) · Berean Standard Bible
εἴτε οὖν ἐγὼ εἴτε ἐκεῖνοι, οὕτω κηρύσσομεν καὶ οὕτως ἐπιστεύσατε.
Whether, then, it was I or they, this is what we preach, and this is what you believed.