Mark 9:1-2

Young's Literal Translation

9 And he said to them, `Verily I say to you, That there are certain of those standing here, who may not taste of death till they see the reign of God having come in power.'

² And after six days doth Jesus take Peter, and James, and John, and bringeth them up to a high mount by themselves, alone, and he was transfigured before them,