Romans 15:20 in the World English Bible
yes, making it my aim to preach the Good News, not where Christ was already named, that I might not build on another’s foundation.
Context
19 Through mighty signs and wonders, by the power of the Spirit of God; so that from Jerusalem, and round about unto Illyricum, I have fully preached the gospel of Christ.
20 Yea, so have I strived to preach the gospel, not where Christ was named, lest I should build upon another man’s foundation:
21 But as it is written, To whom he was not spoken of, they shall see: and they that have not heard shall understand.