The Book of Zuhd and Softening of Hearts
55/9. Chapter:
Saying: "May Allah Have Mercy On You" To One Who Sneezes, And Yawning Is Disliked
Sahih Muslim
وَحَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا أَبُو خَالِدٍ، - يَعْنِي الأَحْمَرَ - عَنْ سُلَيْمَانَ التَّيْمِيِّ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِهِ .
This hadith has been narrated on the authority of Anas through another chain of transmitters.
Reference : Sahih Muslim 2991bIn-book reference : Book 55, Hadith 70USC-MSA web (English) reference : Book 42, Hadith 7126