´Narrated Salim bin 'Ubaid:` that he was with some people on a journey, and a man among the people sneezed and he said: "As-Salamu Alaikum (peace be upon you)." So he (Salim) said: "'Alaika Wa 'Ala Ummik (upon you and upon your mother)." It seemed as if that bothered the man, so he said: "Indeed I have not said except what the Prophet (ﷺ) said; a man sneezed in the presence of the Prophet (ﷺ) and said: 'As-Salamu 'Alaikum (peace be upon you)' so the Prophet (ﷺ) said: ''Alaika Wa 'Ala Ummik (upon you and upon your mother). When one of you sneezes let him say: "Al-Hamdulillahi Rabbil-'Alamin (All praise is due to the Lord of all that exists)" and let the one responding to him say: Yarhamukallah (May Allah have mercy upon you)" and let him reply: Yaghfirullah Li Walakum (May Allah forgive me and you both)."
Hadith Referenceسنن ترمذي / كتاب الأدب عن رسول الله صلى الله عليه وسلم / 2740
Hadith Takhrij«سنن ابی داود/ الأدب 99 (5031) ، سنن النسائی/عمل الیوم واللیلة 86 (225) ( تحفة الأشراف : 3786) ، و مسند احمد (6/7، 8) (ضعیف) (ہلال بن یساف اور سالم بن عبید کے درمیان سند میں دو راویوں کا سقط ہے، عمل الیوم واللیلة کی روایت رقم: 328-230 سے یہ سقط ظاہر ہے، اگلی روایت صحیح ہے)»