Luke 9:36
And after the voice had occurred, Jesus was found alone. And they kept silent and told no one in those days anything of what they had seen.
Matthew 17:9
And [as] they were coming down from the mountain, Jesus commanded them saying, "Tell no one the vision until the Son of Man is raised from the dead."
Ecclesiastes 3:7
a time to tear and a time to sew; a time to be silent and a time to speak;
Mark 9:6
(For he did not know what he should answer, because they were terrified.)
Mark 9:9-10
And [as] they were coming down from the mountain, he ordered them that they should tell no one [the things] that they had seen, except when the Son of Man had risen from the dead.