It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that when Surah Nasr was revealed to the Prophet (peace and blessings be upon him), if he recited it in prayer, he would say three times in its bowing (ruku'): " «سُبْحَانَكَ اللَّهُمَّ رَبَّنَا وَبِحَمْدِكَ اللَّهُمَّ اغْفِرْ لِي إِنَّكَ أَنْتَ التَّوَّابُ الرَّحِيمُ» "Glory is to You, O Allah! O our Lord! And all praise is for You. O Allah! Forgive me, for surely You are the Acceptor of repentance, the Most Merciful."