Mark 9:7 YLT

⁵  And Peter answering saith to Jesus, 'Rabbi, it is good to us to be here; and we may make three booths, for thee one, and for Moses one, and for Elijah one:'

⁶  for he was not knowing what he might say, for they were greatly afraid.

⁷  And there came a cloud overshadowing them, and there came a voice out of the cloud, saying, 'This is My Son -- the Beloved, hear ye him;'

⁸  and suddenly, having looked around, they saw no one any more, but Jesus only with themselves.

⁹  And as they are coming down from the mount, he charged them that they may declare to no one the things that they saw, except when the Son of Man may rise out of the dead;