Sahih al-Bukhari, Hadith 4967 ⓘ
Narrated Aisha: "When the "Surat-An-Nasr", 'When comes the Help of Allah and the conquest,' had been revealed to the Prophet he did not offer any prayer except that he said therein, "Subhanka Rabbana wa bihamdika; Allahumma ighfirli (I testify the Uniqueness of our Lord, and all the praises are for Him: O Allah, forgive me!")
حَدَّثَنَا الْحَسَنُ بْنُ الرَّبِيعِ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنِ الأَعْمَشِ، عَنْ أَبِي الضُّحَى، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ مَا صَلَّى النَّبِيُّ صلى الله عليه وسلم صَلاَةً بَعْدَ أَنْ نَزَلَتْ عَلَيْهِ {إِذَا جَاءَ نَصْرُ اللَّهِ وَالْفَتْحُ} إِلاَّ يَقُولُ فِيهَا " سُبْحَانَكَ رَبَّنَا وَبِحَمْدِكَ، اللَّهُمَّ اغْفِرْ لِي ".
also referenced under: Book 65, Hadith 4967 (In-Book) & Volume 6, Book 60, Hadith 491 (USC-MSA)