Mark 3:14
And he ordained twelve, that they should be with him, and that he might send them forth to preach,
Torrey's Topical Textbook—AKJV

Mark 6:7
And he called to him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;
Torrey's Topical Textbook—AKJV

Luke 10:1-11
After these things the LORD appointed other seventy also, and sent them two and two before his face into every city and place, where he himself would come.
Torrey's Topical Textbook—AKJV