Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom. And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart,
-- Matthew 16:28f.
And he said unto them, Verily I say unto you, That there be some of them that stand here, which shall not taste of death, till they have seen the kingdom of God come with power. And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured before them.
-- Mark 9:1f.
But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God. And it came to pass about an eight days after these sayings, he took Peter and John and James, and went up into a mountain to pray.
-- Luke 9:27f.