John Gill 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 he suffered no man to follow him
To the house of the ruler, but dismissed the multitude, being not desirous of the honour and applause of men: probably what he said to the ruler, was privately, and with a low voice, so that the multitude did not hear him; and understanding by the messengers that the child was dead, were the more easily prevailed upon to depart, since they might conclude there was nothing now to be done;

save Peter, and James, and John, the brother of James :
three favourite disciples, who were a sufficient number of witnesses; and who were taken alone along with Christ on some other occasions, as at his transfiguration, and when in the garden.