John Gill Commentary Isaiah 60:3

"And nations shall come to thy light, and kings to the brightness of thy rising." — Isaiah 60:3 (ASV)

And the Gentiles shall come to your light
To the Gospel, preached in the midst of her; and to Christ, who is her light and into her church state, and partake of the prosperity and happiness of it. The Targum is, ``and nations shall walk in your light;'' and so in (Revelation 21:24) , where it is interpreted of the nations of them that are saved, truly regenerated and converted persons: and kings to the brightness of your rising ;
Christ, the sun of righteousness, will rise upon her; and this being the morning of the latter day glory, the church will rise as a bright morning star; and such be the evidence and lustre of Gospel truths and ordinances, that kings shall be enlightened by them, and come and join themselves unto her, and walk with her in all the commandments and ordinances of the Lord. Some of this high rank and dignity have been called, and but a few; but in those times the instances will be many, even all kings shall serve and worship the Lord, (Psalms 72:11) .