﴿ رَبَّنَآ إِنَّكَ جَامِعُ ٱلنَّاسِ لِيَوْمٍۢ لَّا رَيْبَ فِيهِ ۚ إِنَّ ٱللَّهَ لَا يُخْلِفُ ٱلْمِيعَادَ ﴾

“"O our Sustainer! Verily, Thou wilt gather mankind together to witness the Day about [the coming of] which there is no doubt: verily, God never fails to fulfil His promise."”

Our Lord, You shall gather mankind for a day of which there is no doubt, that is, He will gather them for the Day of Gathering which is the arrival at the station of the unity that comprehends the entirety of creation, the first and the last, such that they shall have no lingering doubt in that locus of witnessing of theirs.