Sahih Muslim 2993
Sahih Muslim · Book 55: The Book of Zuhd and Softening of Hearts · Saying: "May Allah Have Mercy On You" To One Who Sneezes, And Yawning Is Disliked
Iyas b. Salama b. al-Akwa reported that his father reported to him that he heard Allah's Apostle (ﷺ) as saying:
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ ، حَدَّثَنَا وَكِيعٌ ، حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ ، عَنْ إِيَاسِ، بْنِ سَلَمَةَ بْنِ الأَكْوَعِ عَنْ أَبِيهِ ، ح وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ ، - وَاللَّفْظُ لَهُ - حَدَّثَنَا أَبُو النَّضْرِ، هَاشِمُ بْنُ الْقَاسِمِ حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ ، حَدَّثَنِي إِيَاسُ بْنُ سَلَمَةَ بْنِ الأَكْوَعِ ، أَنَّ أَبَاهُ ، حَدَّثَهُ أَنَّهُ، سَمِعَ النَّبِيَّ صلى الله عليه وسلم وَعَطَسَ رَجُلٌ عِنْدَهُ فَقَالَ لَهُ " يَرْحَمُكَ اللَّهُ " . ثُمَّ عَطَسَ أُخْرَى فَقَالَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم " الرَّجُلُ مَزْكُومٌ " .
A person sneezed in his presence and he said to him: May Allah have mercy upon you. And he then sneezed for the second time and Allah's Messenger (ﷺ) said to him: He is suffering from cold (and no response is necessary).