The news of Cornelius’ conversion and baptism would have spread as Christian believers go from place to place visiting their friends and family. Possibly the men who accompanied Peter returned to Joppa before he did, in which case they told the believers in Joppa.
1 Les apôtres et les frères qui étaient dans la Judée apprirent que les païens avaient aussi reçu la parole de Dieu.