Sahih Muslim 447
صحيح مسلم#447Sahihحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا يَحْيَى بْنُ زَكَرِيَّاءَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، فِي قَوْلِهِ عَزَّ وَجَلَّ { وَلاَ تَجْهَرْ بِصَلاَتِكَ وَلاَ تُخَافِتْ بِهَا} قَالَتْ أُنْزِلَ هَذَا فِي الدُّعَاءِ .
A'isha reported that so far as these words of (Allah) Glorious and High are concerned:" And utter not thy prayer loudly, not be low in it" (xvii. 110) relate to supplication (du'a)
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 447 is the standard (Abd al-Baqi) number; this narration is #1002 in the MuslimGPT index.
In-book reference: 4:164