Sahih Muslim 123
صحيح مسلم#123Sahihحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَعَبْدُ بْنُ حُمَيْدٍ، قَالاَ أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، بِهَذَا الإِسْنَادِ ح وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا أَبُو مُعَاوِيَةَ، حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ حَكِيمِ بْنِ حِزَامٍ، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَشْيَاءَ كُنْتُ أَفْعَلُهَا فِي الْجَاهِلِيَّةِ - قَالَ هِشَامٌ يَعْنِي أَتَبَرَّرُ بِهَا - فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَسْلَمْتَ عَلَى مَا أَسْلَفْتَ لَكَ مِنَ الْخَيْرِ " . قُلْتُ فَوَاللَّهِ لاَ أَدَعُ شَيْئًا صَنَعْتُهُ فِي الْجَاهِلِيَّةِ إِلاَّ فَعَلْتُ فِي الإِسْلاَمِ مِثْلَهُ .
It is narrate on the authority of Hakim b. Hizam:I said: Messenger of Allah, I did so some of the deeds in the state of ignorance. (One of the transmitters Hisham b. Urwa explained them as acts of piety. Upon this the Messenger, of Allah remarked: You have embraced Islam with all the previous acts of virtue. I said: By God, I would leave nothing undone in Islam the like of which I did in the state of ignorance)
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
Sahih Muslim 123 is the standard (Abd al-Baqi) number; this narration is #325 in the MuslimGPT index.
In-book reference: 1:232