Mark 6:7

“And he called unto him the twelve, etc..] “His twelve disciples”, as some copies read; whom he had before called by his grace, and had appointed and ordained them his apostles, but had not yet publicly sent forth; in order to which, he now called them to him, and gave them their commission, qualifications, and instructions: and began to send them forth by two and two: he first sent forth one couple, and then another; the reason of his sending them by pairs, was partly for the sake of company, and that they might be useful and assisting to one another; and partly to show their agreement in doctrine; and that they might be proper and sufficient witnesses of it, whereby it might be established;…”

“And he called unto him the twelve - See the notes at Matthew 10:1. And began to send them forth by two and two - In order that they might “support” and “encourage” each other in their work. Amid the trials and opposition with which they would meet, mutual counsel and aid would greatly lighten their burdens and alleviate their calamities. Mutual counsel might also contribute to their success, and lead to “united” plans to advance the kingdom of the Redeemer. Jesus here, as in all the work of religion, consulted at the same time the “happiness” and the “usefulness” of his disciples; nor are they ever separated. Whatever contributes to the “usefulness” of his people produces also their…”

“Mat 10:1; Luk 9:1. Mark 6:8”

“6:7-13 Jesus now sent the disciples out to preach and heal. During this mission, Jesus’ memorable teachings were engraved in their minds by retelling, and it prepared them to remember and retell later what Jesus did and taught (Luke 1:2). 6:7 two by two: This practice fulfilled the Old Testament requirement of two witnesses (Num 35:30; Deut 17:6; 19:15; see Matt 18:16) and provided for companionship and mutual help (Acts 13:1-3; 15:22, 39, 40). • giving them authority: Jesus can delegate his authority (see Mark 1:27; 2:10) to others. • The disciples were to cast out evil spirits and to preach and heal (6:12-13; see 6:30).”

“the twelve: Mar 3:13, Mar 3:14; Mat 10:1-4; Luk 6:13-16, Luk 9:1-6, Luk 10:3-12 two and: Exo 4:14, Exo 4:15; Ecc 4:9, Ecc 4:10; Rev 11:3 power: Mar 16:17; Luk 10:17-20 Mark 6:8”