Luke 8:51

 51 When He came to the house, He did not allow anyone to enter with Him, except Peter and John and James, and the girl’s father and mother.

Here is when Jesus went to Jairus’ house (a synagogue ruler) to heal his twelve-year-old daughter; and only Peter, with James and John were allowed by Jesus to enter her room and witness the healing. This is an indication that these three were the closest disciples—those Jesus trusted most.