It was narrated from Abu Salamah that Abu Hurairah said: “The Messenger of Allah صلی اللہ علیہ وآلہ وسلم stood up to pray and we stood up with him. A Bedouin said — while he was praying — ‘Allah, have mercy on me and on Muhammad and do not have mercy on anyone else.’ When the Messenger of Allah صلی اللہ علیہ وآلہ وسلم said the Salam, he said to the Bedouin: ‘You have limited something vast,’ meaning the mercy of Allah.” (Sahih)