Sunan an-Nasa'i 1012
سنن النسائي#1012SahihIt was narrated that Ibn Abbas said:"The Prophet (ﷺ) used to raise his voice when reciting Quran, and when the idolaters heard his voice they would insult the Quran and the one who had brought it. So the Prophet (ﷺ) began to lower his voice such that his companions would not hear him. Then Allah (SWT), the Mighty and Sublime, revealed: 'And offer your salah (prayer) neither aloud nor in a low voice, but follow a way between
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 11:137