Narrated Abu Musa:
The Jews used to sneeze in the presence of the Prophet (ﷺ) hoping that he would say: 'Yarhamukumullah (May Allah have mercy upon you).' So he said: 'Yahdikumullahu Wa Yuslihu Balakum (May Allah guide you and rectify your affairs).'" (FR)
English reference (FR): Vol. 5, Book 41, Hadith 2739 (FR)
Arabic reference (FR): Book 43, Hadith 2958 (FR)