Sahih Muslim Book - 11, Hadith - 2129

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ وَأَبُو كُرَيْبٍ قَالاَ حَدَّثَنَا أَبُو مُعَاوِيَةَ عَنِ الأَعْمَشِ عَنْ شَقِيقٍ عَنْ أُمِّ سَلَمَةَ قَالَتْ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « إِذَا حَضَرْتُمُ الْمَرِيضَ أَوِ الْمَيِّتَ فَقُولُوا خَيْرًا فَإِنَّ الْمَلاَئِكَةَ يُؤَمِّنُونَ عَلَى مَا تَقُولُونَ ». قَالَتْ فَلَمَّا مَاتَ أَبُو سَلَمَةَ أَتَيْتُ النَّبِىَّ -صلى الله عليه وسلم- فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّ أَبَا سَلَمَةَ قَدْ مَاتَ قَالَ « قُولِى اللَّهُمَّ اغْفِرْ لِى وَلَهُ وَأَعْقِبْنِى مِنْهُ عُقْبَى حَسَنَةً ». قَالَتْ فَقُلْتُ فَأَعْقَبَنِى اللَّهُ مَنْ هُوَ خَيْرٌ لِى مِنْهُ مُحَمَّدًا -صلى الله عليه وسلم-.

It was narrated that Umm Salamah said: "The Messenger of Allah (s.a.w) said: 'If you are in the presence of one who is sick or dying, then say good things, for the Angels say Amin to whatever you say."' She said: "When Abu Salamah died I came to the Prophet (s.a.w) and said: 'O Messenger of Allah, Abu Salamah has died.' He said: 'Say: Allahummaghfili wa lahu, wa a'qibni minhu 'uqba hasanah (O Allah, forgive me and him, and compensate me with something good.) She said: "I said it and Allah compensated me 'with someone who was better than him, Muhammad (s.a.w).''