Gevurot Meyruach Hakodesh 15:22

Then it was mekabel (received) by the Moshiachʼs Shlichim and the Zekenim with the entire Kehillah to choose anashim from them to send to Syrian Antioch with Rav Sha'ul and Bar-Nabba, also Yehudah called Bar-Sabba, and Sila, all manhigim among the Achim b'Moshiach