Mark 3:14
3:14 He appointed twelve (whom he named apostles), so that they would be with him and he could send them to preach
Mark 5:42
5:42 The girl got up at once and began to walk around (she was twelve years old). They were completely astonished at this.
Mark 6:7
Sending Out the Twelve Apostles
6:7 Jesus called the twelve and began to send them out two by two. He gave them authority over the unclean spirits.
Mark 8:19
8:19 When I broke the five loaves for the five thousand, how many baskets full of pieces did you pick up?” They replied, “Twelve.”
Mark 9:35
9:35 After he sat down, he called the twelve and said to them, “If anyone wants to be first, he must be last of all and servant of all.”
Mark 11:11
11:11 Then Jesus entered Jerusalem and went to the temple. And after looking around at everything, he went out to Bethany with the twelve since it was already late.