Riyad as-Salihin
Riyad as-Salihin 883
Saying "Al-Hamdulillah" When Sneezing, Its Reply, and Manners Relating to Sneezing and Yawning
Arabic hadith text
وعن أبي موسي رضي الله عنه قال: كان اليهود يتعاطسون عند رسول الله صلى الله عليه وسلم يرجون أن يقول لهم: يرحمكم الله، فيقول: ""يهديكم الله ويصلح بالكم" ((رواه أبو داود، والترمذي وقال: حديث حسن صحيح)).
Translation
Abu Musa (May Allah be pleased with him) reported
The Jews used to intentionally sneeze in the presence of the Messenger of Allah (ﷺ) hoping that he would say to them: 'Yarhamukum-ullah (may Allah have mercy on you),' but he would respond with: "Yahdikum-ullahu wa yuslihu balakum (may Allah guide you and render sound your state of affairs)."[Abu Dawud and At- Tirmidhi].