Mark 9:1
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.
Cross-reference
Matthew 16:28
Parallel
Matthew 16:28 is the parallel account of the same saying about not tasting death before seeing the Son of Man's kingdom.
Luke 9:27
Parallel
Luke 9:27 is the parallel account of the same saying about not tasting death before seeing the kingdom of God.
2 Peter 1:16
Prophetic fulfillment
In 2 Peter 1:16, Peter recalls being an eyewitness of Christ's majesty, directly confirming that the Transfiguration fulfilled Jesus' promise of seeing the kingdom come with power.