AHMAD 3719:
from ʿAbdullāh —
[Machine] Indeed, the Prophet ﷺ used to frequently say, "Subhanaka Rabbana wa bihamdika Allahumma ighfirli," which means "Glory be to You, our Lord, and praise be to You, O Allah. O Allah, forgive me." He said this when the following verse was revealed: "When comes the help of Allah, and victory, and you see mankind entering the religion of Allah in troops. Celebrate the praises of your Lord, and pray for His forgiveness: for He is Oft-Returning (in forgiveness) and Most Merciful." (Quran 110: 1-3)
أحمد ٣٧١٩:
عن عبد الله —
أَنَّ النَّبِيَّ ﷺ كَانَ مِمَّا يُكْثِرُ أَنْ يَقُولَ سُبْحَانَكَ رَبَّنَا وَبِحَمْدِكَ اللهُمَّ اغْفِرْ لِي قَالَ فَلَمَّا نَزَلَتْ إِذَا جَاءَ نَصْرُ اللهِ وَالْفَتْحُ قَالَ سُبْحَانَكَ رَبَّنَا وَبِحَمْدِكَ اللهُمَّ اغْفِرْ لِي إِنَّكَ أَنْتَ التَّوَّابُ الرَّحِيمُ
hadithunlocked.com