(20) باب الْكَلاَمِ فِي الصَّلاَةِ
It was narrated from Abu Salamah that :
Abu Hurairah said: "The Messenger of Allah (ﷺ) stood up to pray and we stood up with him. A Bedouin said- while he was praying- 'O Allah, have mercy on me and Muhammad and do not have mercy on anyone else.' When the Messenger of Allah (ﷺ) said the Salam, he said to the Bedouin: 'You have limited something vast," meaning the mercy of Allah (SWT)."
Reference: Sunan an-Nasa'i 1216
In-book reference: Book 13, Hadith 38
English translation: Vol. 2, Book 13, Hadith 1217