God commits various tasks to his servants. A principal task of those sent by God is to take the good news of the gospel to those who have not heard it, and so to be a means through which others come to faith.
Exodus 3:10Moses is sent by God to Pharoah; Joshua 22:3The eastern tribes complete their mission to help the others take possession of Canaan; Judges 6:14Gideon is sent by God against the Midianites; 1 Samuel 15:18-20Saul is given the task of destroying the Amalekites; 1 Samuel 16:1Samuel is sent by God to anoint David as king; Isaiah 48:15Cyrus is appointed to bring deliverance from Babylon.
Barnabas' and Saul's mission to deliver money collected for the church in Judea: