Mark 3:13
"And he goeth up into a mountain, and calleth unto him whom he would: and they came unto him."
Cross References (ranked by relevance)
Luke 9:1
Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.
Matthew 5:1
And seeing the multitudes, he went up into a mountain: and when he was set, his disciples came unto him:
Mark 6:7
And he called unto him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;