وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ رَجُلاً، عَطَسَ يَوْمَ الْجُمُعَةِ وَالإِمَامُ يَخْطُبُ فَشَمَّتَهُ إِنْسَانٌ إِلَى جَنْبِهِ فَسَأَلَ عَنْ ذَلِكَ سَعِيدَ بْنَ الْمُسَيَّبِ فَنَهَاهُ عَنْ ذَلِكَ وَقَالَ لاَ تَعُدْ ‏.‏

Yahya related to me from Malik that he had heard that a mansneezed on the day of jumua while the imam was giving the khutba, anda man by his side asked Allah to bless him. Said ibn al Musayyab wasasked about it and he forbade the man to do what he had done and said,"Don't do it again." Translation Not Available

Book Ref: Muwatta Imam Malik Book 5 Hadith 235
Web Ref:  Muwatta Imam Malik Book 5 Hadith 10