Acts 1:21
The person [to replace Judas] would have to be one of those who accompanied us [disciples] during the time the Lord traveled around with us,
John 15:27
And you will give testimony about me [also], because you men have been with me from the beginning [of my ministry]."
Luke 10:1-2
Now after these things [happened] the Lord appointed seventy-two other disciples [Note: Some ancient manuscripts say "seventy." This group would have been in addition to the twelve. See Luke 9:1], and sent them two by two on ahead of Him into every town and locality that He planned to visit.
John 10:1-9
"Truly, truly, I tell you, the person who does not enter the sheep corral through the gate, but climbs over another way [i.e., over the fence], is a thief and a robber. [Note: "Thief" suggests quiet subtlety, while "robber" suggests open aggression].