When Christ chose the twelve, it is said, Luke 3:14,15, that he ordained twelve, that they should be with him, and that he might send them forth to preach, and to have power to heal sicknesses, and to cast out devils. So that till Christ's ascension, though they went out from him to preach and work miracles, yet they ordinarily were with him, receiving further instructions. When they had preached, and in his name wrought many miracles, they again returned to Christ, and gave him account both of their doctrine and of the cures they had wrought.
Related Commentaries of Mark 6:30
Mark 6:30
30 And the apostles gathered themselves together unto Jesus, and told him all things, both what they had done, and what they had taught.