Abdullah bin Umar reported,

The Messenger of Allah ﷺ would sometimes recite the Quran, and when he came across a verse of prostration, he would prostrate and we would prostrate with him, crowding around him so closely that some of us could not find a spot to place his forehead. This was outside of formal prayer.

Muslim 1296

Sahih

حدثنا أبو بكر بن أبي شيبة حدثنا محمد بن بشر حدثنا عبيد الله بن عمر عن نافع

عن ابن عمر قال

ربما قرأ رسول الله ﷺ القرآن فيمر بالسجدة فيسجد بنا حتى ازدحمنا عنده حتى ما يجد أحدنا مكانا ليسجد فيه في غير صلاة

مسلم 1296صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Mosques and places of prayer
Chapter
Prostration of recitation
Numbering
Darussalam 1296
Muslim 1296