How many of the Nephite disciples did Jesus say would never die?

TRIV How many of the Nephite disciples did Jesus say would never die?

I, the Lord, have decreed, and the destroyer rideth upon the face thereof, and I revoke not the decree. Doctrine & Covenants 61:19

He [Jesus] turned himself unto the three, and said unto them ... ye shall never taste of death. 3 Nephi 28:4

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