Acts 8:1, 5, 14

And Saul approved of their killing him. On that day a great persecution broke out against the church in Jerusalem, and all except the apostles were scattered throughout Judea and Samaria.

Philip went down to a city in Samaria and proclaimed the Messiah there.

When the apostles in Jerusalem heard that Samaria had accepted the word of God, they sent Peter and John to Samaria.