John Calvin Commentary Mark 5:37

"And he suffered no man to follow with him, save Peter, and James, and John the brother of James." — Mark 5:37 (ASV)

And did not permit any one to follow him. He forbade them to enter, either because they were unworthy to be his witnesses of the miracle, or because he did not choose that the miracle should be overpowered by a noisy crowd around him.

It was better that the young woman, whose dead body they had seen, should suddenly appear before everyone, alive and full of vigor. Mark and Luke tell us that not more than three of the disciples were admitted, and both also mention the parents. Mark alone states that those who had accompanied Jairus when he came to supplicate Christ were admitted. Matthew, who is more concise, takes no notice of this circumstance.