It was Peter who opened the doors of the Church
to 3,000 Jews who were converted by one of his
sermons on the day of Pentecost.

And it was also Peter who was at Cornelius' house
and brought into the Christian Church, the first
Gentiles (Acts 10; 15:7).

The promise wasn't given just to Peter; it is
given to the Church, but only as it lives in the unity
of the Body of Christ.