that the Messenger of Allah ﷺ said: "Indeed Allah loves sneezing and He dislikes the yawn. So when one of you sneezes and says 'Al-Hamdulillah (All praise is due to Allah),' then it is a right due from every one who hears him to say: 'Yarhamukallah (May Allah have mercy upon you)' As for yawning then when one of you yawns let him suppress it as much as possible and not say: "Hah Hah' for that is only from Ash-Shaitan laughing at him." (Using translation from Tirmidhī 2747)   

قَالَ رَسُولُ اللَّهِ ﷺ «إِنَّ اللَّهَ يُحِبُّ الْعُطَاسَ وَيَكْرَهُ التَّثَاؤُبَ فَإِذَا تَثَاءَبَ أَحَدُكُمْ فَلْيَرُدَّ مَا اسْتَطَاعَ وَلَا يَقُلْ هَاوْ فَإِنَّهُ إِذَا قَالَ هَاوْ ضَحِكَ مِنْهُ الشَّيْطَانُ فَإِذَا عَطَسَ أَحَدُكُمْ فقَالَ الْحَمْدُ لِلَّهِ فَحَقٌّ عَلَى مَنْ سَمِعَهُ أَنْ يَقُولَ يَرْحَمُكَ اللَّهُ»  

[Machine] Salem greeted with "Peace be upon you, and upon your mother." Then the man found himself and Salem said to him, "Are you alright?" He replied, "I would prefer not to mention my mother with good or bad." Salem then said, "We were with the Messenger of Allah during a journey, and a man sneezed. The Messenger of Allah said, 'May peace be upon you.' The man replied, 'And upon you and your mother.' The Messenger of Allah said, 'When one of you sneezes, let him say praise be to Allah in every situation, or he may say praise be to Allah, the Lord of all the worlds, and let him say to him, 'May Allah have mercy on you,' and he should say, 'May Allah forgive you.'"  

فقَالَ سَالِمٌ السَّلَامُ عَلَيْكَ وَعَلَى أُمِّكَ فَوَجَدَ الرَّجُلُ فِي نَفْسِهِ فقَالَ لَهُ سَالِمٌ كَأَنَّكَ وَجَدْتَ فِي نَفْسِكَ؟ فقَالَ مَا كُنْتُ أُحِبُّ أَنْ تَذْكُرَ أُمِّي بِخَيْرٍ وَلَا بِشَرٍّ فقَالَ سَالِمٌ كُنَّا مَعَ رَسُولِ اللَّهِ ﷺ فِي سَفَرٍ فَعَطَسَ رَجُلٌ فقَالَ السَّلَامُ عَلَيْكُمْ فقَالَ رَسُولُ اللَّهِ ﷺ «عَلَيْكَ وَعَلَى أُمِّكَ إِذَا عَطَسَ أَحَدُكُمْ فَلْيَقُلِ الْحَمْدُ لِلَّهِ عَلَى كُلِّ حَالٍ أَوْ قَالَ الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ وَلْيَقُلْ لَهُ يَرْحَمُكَ اللَّهُ وَلْيَقُلْ هُوَ يَغْفِرُ اللَّهُ لَكُمْ»  

[Machine] Two men sneezed in front of the Prophet ﷺ , and one of them said "Alhamdulillah" (praise be to Allah), while the other did not say it. The Prophet ﷺ said, "Indeed, this one praised Allah, and this one did not."  

عَطَسَ رَجُلَانِ عِنْدَ النَّبِيِّ ﷺ فَشَمَّتَ أَوْ فَسَمَّتَّ أَحَدَهُمَا وَتَرَكَ الْآخَرَ قَالَ «إِنَّ هَذَا حَمِدَ اللَّهَ وَإِنَّ هَذَا لَمْ يَحْمَدْهُ»  

Two men sneezed in the presence of the prophet (May peace be upon him). He said : Allah have mercy on you! To one and not to the other. He was asked: Messenger of Allah! Two persons sneezed. Ahmad’s version has: You invoked a blessing on one of them and left the other. He replied : This man praised Allah, and this man did not praise Allah. (Using translation from Abū Dāʾūd 5039)   

عَطَسَ رَجُلَانِ عِنْدَ النَّبِيِّ ﷺ فَشَمَّتَ أَحَدَهُمَا أَوْ قَالَ فَسَمَّتَ أَحَدَهُمَا وَلَمْ يُشَمِّتِ الْآخَرَ فَقِيلَ لَهُ رَجُلَانِ عَطَسَا فَشَمَّتَّ أَحَدَهُمَا وَتَرَكْتَ الْآخَرَ؟ قَالَ «إِنَّ هَذَا حَمِدَ اللَّهَ وَإِنَّ هَذَا لَمْ يَحْمَدْهُ»  

[Machine] Two men sat next to the Prophet ﷺ, one of them was more honorable than the other. The honorable one sneezed but did not praise Allah, while the other sneezed and praised Allah. So the Prophet ﷺ turned towards the one who did not praise Allah and said, "O Messenger of Allah, I sneezed but you did not pray for me, and this person sneezed, and you prayed for him?" The Prophet ﷺ replied, "Indeed, he mentioned the name of Allah, so I remembered him, and you forgot, so I forgot you."  

جَلَسَ رَجُلَانِ عِنْدَ رَسُولِ اللَّهِ ﷺ أَحَدُهُمَا أَشْرَفُ مِنَ الْآخَرِ فَعَطَسَ الشَّرِيفُ فَلَمْ يَحْمَدِ اللَّهَ وَعَطَسَ الْآخَرُ فَحَمِدَ اللَّهَ فَشَمَّتَهُ النَّبِيُّ ﷺ فقَالَ يَا رَسُولَ اللَّهِ عَطَسْتُ فَلَمْ تُشَمِّتْنِي وَعَطَسَ هَذَا فَشَمَّتَّهُ؟ فقَالَ ﷺ «إِنَّ هَذَا ذَكَرَ اللَّهَ فَذَكَرْتُهُ وَأَنْتَ نَسِيتَ فَنَسِيتُكَ»  

when a man sneezed beside the prophet (May peace be upon him), he said to him : Allah have mercy on you, but when he sneezed again, he said : The man has a cold in the head. (Using translation from Abū Dāʾūd 5037)   

كُنْتُ قَاعِدًا عِنْدَ النَّبِيِّ ﷺ فَعَطَسَ رَجُلٌ فقَالَ النَّبِيُّ ﷺ «يَرْحَمُكَ اللَّهُ» ثُمَّ عَطَسَ أُخْرَى فقَالَ ﷺ «الرَّجُلُ مَزْكُومٌ»