And as they came down from the mountain
Christ and his three disciples, Peter, James, and John, whom he led up thither:
he charged them that they should tell no man what things
on the mount, as the transfiguration of himself, the persons of Moses and Elias, and the bright cloud from whence the voice came, which bore testimony of Christ's sonship: he ordered to keep the whole of this a secret from every man, even from their fellow disciples,
till the Son of man were risen from the dead;
(See Gill on Matthew 17:9).