A.T. Robertson Commentary Revelation 2:26

"And he that overcometh, and he that keepeth my works unto the end, to him will I give authority over the nations:" — Revelation 2:26 (ASV)

He that overcometh and he that keepeth (ο νικων κα ο τηρων). Present active articular participles of νικαω and τηρεω in the nominative absolute (nominativus pendens) as in 3:12,21, resumed by the dative αυτω (to him), as in verses 7,17.

Unto the end (αχρ τελους). That is, αχρ ου αν ηξο above.

Authority over the nations (εξουσιαν επ των εθνων). From Ps 2:8f. The followers of the Messiah will share in his victory over his enemies (1:6; 12:5; 19:15).