Mishkat al-Masabih 5 Funerals كتاب الجنائز 92

عَنْ أَبِي سَعِيدٍ وَأَبِي هُرَيْرَةَ قَالَا: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَقِّنُوا مَوْتَاكُمْ لَا إِلَهَ إِلَّا اللَّهُ» . رَوَاهُ مُسْلِمٌ

Abu Sa’id and Abu Huraira reported God’s messenger as saying, “Recite to those of you who are dying, ‘There is no god but God. ’ ” Muslim transmitted it.