NET

7 But in the days when the seventh angel is about to blow his trumpet, the mystery of God is completed, just as he has proclaimed to his servants the prophets.”

Darby

7 but in the days of the voice of the seventh angel, when he is about^D9542 to sound the trumpet, the mystery of God also shall be completed^D9543, as he has made known the glad tidings to his own bondmen the prophets.

Darby Bible Notes

about - Or 'when he shall sound.' I have translated literally; but the sense I believe to be 'when he shall sound, as he is about to do.' completed - Aorist, 'will have been.' But in the Revelation the aorist is almost everywhere used where other tenses might be put. Such evident Hebraisms are incessant.

KJV

7 But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.

Strong's

7 But ^G235 in^G1722 the days^G2250 of the voice^G5456 of the seventh^G1442 angel^G32, when^G3752 he shall begin^G3195 to sound^G4537, ^G2532 the mystery^G3466 of God^G2316 should be finished^G5055, as^G5613 he hath declared^G2097 to his^G1438 servants^G1401 the prophets^G4396.