Abu Hurayra reported that the Prophet, may Allah bless him and
grant him peace, said, "Allah loves the sneeze and dislikes yawning. When
one you sneezes and praises Allah, it is a duty for every Muslim who hears
him to say, 'May Allah have mercy on you.;' As for the yawn, it comes from
Shaytan. When one of you yawns, he should repress it as much as possible.
When one of you yawns, Shaytan laughs at him."
حَدَّثَنَا إِسْحَاقُ، قَالَ: أَخْبَرَنَا يَعْلَى، قَالَ: أَخْبَرَنَا أَبُو مُنَيْنٍ وَهُوَ يَزِيدُ بْنُ كَيْسَانَ، عَنْ أَبِي حَازِمٍ، عَنْ أَبِي هُرَيْرَةَ قَالَ: كُنَّا جُلُوسًا عِنْدَ رَسُولِ اللهِ صلى الله عليه وسلم فَعَطَسَ رَجُلٌ فَحَمِدَ اللَّهَ، فَقَالَ لَهُ رَسُولُ اللهِ صلى الله عليه وسلم: يَرْحَمُكَ اللَّهُ، ثُمَّ عَطَسَ آخَرُ، فَلَمْ يَقُلْ لَهُ شَيْئًا، فَقَالَ: يَا رَسُولَ اللهِ، رَدَدْتَ عَلَى الْآخَرِ، وَلَمْ تَقُلْ لِي شَيْئًا؟ قَالَ: إِنَّهُ حَمِدَ اللَّهَ، وَسَكَتَّ.
Abu Hurayra said, "We were sitting with the Messenger of Allah,
may Allah bless him and grant him peace, when a man sneezed and praised
Allah. The Messenger of Allah, may Allah bless him and grant him peace,
said to him, 'May Allah have mercy on you.' Then another man sneezed but
the Prophet did not say anything to him. The man, 'Messenger of Allah!
you responded to the other man, but did not say anything to me!' The Prophet
replied, 'He praised Allah and you were silent.'"
Abu Salih reported that the Prophet, may Allah bless him and grant
him peace, said, "When one of you sneezes, he should say, 'Praise be to
Allah.' When he says, 'Praise be to Allah, ' his brother or companion should
say to him, 'May Allah have mercy on you.' Then let the person who sneezed
say, 'May Allah guide you and put your affairs in order.'"