[Machine] The Messenger of Allah ﷺ used to frequently say before his death, "SubhanAllah wa bihamdihi, astaghfirullah wa atubu ilayhi." I said, "O Messenger of Allah, you supplicate with a supplication that you did not use to supplicate with before today." He said, "Indeed, my Lord has informed me that I will see a sign in my Ummah, and when I see that sign, I should say 'SubhanAllah wa bihamdihi' and seek forgiveness from Him. Indeed, I have seen that sign when the victory of Allah and the conquest comes, and you see the people entering the religion of Allah in multitudes." [Surah An-Nasr: 2]
كَانَ رَسُولُ اللهِ ﷺ يُكْثِرُ أَنْ يَقُولَ قَبْلَ مَوْتِهِ سُبْحَانَ اللهِ وَبِحَمْدِهِ أَسْتَغْفِرُ اللهَ وَأَتُوبُ إِلَيْهِ قَالَتْ وَكَانَ يُكْثِرُ أَنْ يَقُولَهُ فَقُلْتُ يَا رَسُولَ اللهِ إِنَّكَ تَدْعُو بِدُعَاءٍ لَمْ تَكُنْ تَدْعُو بِهِ قَبْلَ الْيَوْمِ فَقَالَ إِنَّ رَبِّي ﷻ أَخْبَرَنِي أَنِّي سَأَرَى عَلَمًا فِي أُمَّتِي وَأَنِّي إِذَا رَأَيْتُ ذَلِكَ الْعَلَمَ أَنْ أُسَبِّحَ بِحَمْدِهِ وَأَسْتَغْفِرَهُ فَقَدْ رَأَيْتُ ذَلِكَ {إِذَا جَاءَ نَصْرُ اللهِ وَالْفَتْحُ وَرَأَيْتَ النَّاسَ يَدْخُلُونَ فِي دِينِ اللهِ أَفْوَاجًا} [النصر 2]