John Gill Commentary Mark 5:39

"And when he was entered in, he saith unto them, Why make ye a tumult, and weep? the child is not dead, but sleepeth." — Mark 5:39 (ASV)

And when he was come in
Into the house, within doors, into one of the apartments, and where the company of mourners, and the pipers, and mourning women were, singing and saying their doleful ditties:

he says to them, why make you this ado and weep ?
why all this tumult and noise? this grief and mourning, whether real or artificial?

the damsel is not dead, but sleepeth :
not but that she was truly dead, but not so as to remain under the power of death: she was like a person in a sleep, who would in a little time be awakened out of it: and which was as easily performed by Christ, as if she had been only in a natural sleep; (See Gill on Matthew 9:24).