when he shall come to be glorified in his saints, and to be marvelled at in all them that believed (because our testimony unto you was believed) in that day.

At his coming, when he will have glory in his saints, and will be a cause of wonder in all those who had faith (because our witness among you had effect) in that day.

οταν ελθη να ενδοξασθη εν τοις αγιοις αυτου, και να θαυμασθη εν πασι τοις πιστευουσιν, επειδη σεις επιστευσατε εις την μαρτυριαν ημων, εν τη ημερα εκεινη.

When he shall come to be glorified in his saints, and to be admired in all them that believe (because our testimony among you was believed) in that day.

when he comes in that day to be glorified in his saints, and to be admired among all those who have believed, because our testimony to you was believed.