Abu Saeed Khudri had a dream in which he was writing surah Sad. When he reached its prostration verse, he saw that the inkwell, the pen, and everything in his presence turned over in prostration. He related the dream to the Prophet ﷺ, and from that time onward he never failed to perform the prostration when reciting it.
حدثنا عفان حدثنا يزيد يعني ابن زريع حدثنا حميد قال
أن أبا سعيد الخدري رأى رؤيا أنه يكتب ص فلما بلغ إلى سجدتها قال رأى الدواة والقلم وكل شيء بحضرته انقلب ساجدا قال فقصها على النبي ﷺ فلم يزل يسجد بها بعد