84 Or “who is victorious”; traditionally, “who overcomes.”
85 Grk “keeps.” In a context that speaks of “holding on to what you have,” the idea here is one of continued faithful behavior ( τηρέω 3 has “ὁ τηρῶν τὰ ἔργα μου the one who takes my deeds to heart Rv 2:26”).
86 Or “over the Gentiles” (the same Greek word may be translated “Gentiles” or “nations”).

In other versions

The one who conquers and who keeps my works until the end, to him I will give authority over the nations,

To the one who is victorious and does my will to the end, I will give authority over the nations—

The one who conquers and who keeps my works to the end: I will give him authority over the nations—

To all who are victorious, who obey me to the very end,

To them I will give authority over all the nations.

And the one who conquers and who keeps my works until the end, I will give him authority over the nations,

And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations:

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