Mark 3:15

“And to have power to heal sicknesses, etc..] All manner of corporeal diseases that attend men and women: and to cast out devils; from such who were possessed with them: that is, he chose and appointed them to be his apostles, with a view of conferring such powers upon them hereafter; for as yet, they were not vested with them, nor sent out to exercise them; no, not till near twelve months after.”

“For an account of the appointment of the apostles, see the notes at Matthew 10:1-4. And calleth unto him whom he would - Those whom he chose; whom he was about to appoint to the apostleship. See the notes at John 15:16. Mark 3:14 He ordained twelve - The word rendered “ordained” here does not express our notion of ordination to the ministry. It means, literally, “he made” - that is, he “appointed” twelve to be with him. Twelve - The reason why “twelve” were chosen was, probably, that such a number would be deemed competent witnesses of what they saw; that they could not be easily charged with being excited by sympathy, or being deluded, as a multitude might; and that, being destined to go…”