The Prophet ﷺ used to say frequently, "Glory be to You, Allah, and praise be to You. Allah, forgive me."When the surah "When the help of Allah comes and the victory" [Nasr 110:1] was revealed, he said, "Glory be to You, Allah, and praise be to You. Allah, forgive me, for You are the Accepter of repentance."
حدثنا عفان حدثنا شعبة
كان النبي ﷺ يكثر أن يقول سبحانك اللهم وبحمدك اللهم اغفر لي فلما نزلت إذا جاء نصر الله والفتح قال سبحانك اللهم وبحمدك اللهم اغفر لي إنك أنت التواب
Its isnad is daif because of a break in the chain, and it is a repetition of 3745. Here in both original manuscripts it reads, "Indeed You are the Ever-Relenting," and above it in K is written, "the Merciful," but I am concerned that this may be an addition not belonging to the original text, even though it is established in the earlier narrations.