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