Hadith 4738
عَنْ أَبِي هُرَيْرَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا عَطَسَ غَطَّى وَجْهَهُ بِيَدِهِ أَوْ ثَوْبِهِ وَغَضَّ بِهَا صَوْتَهُ. رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُدَ. وَقَالَ التِّرْمِذِيُّ: هَذَا حَدِيثٌ حَسَنٌ صَحِيح
It is narrated from Abu Huraira (may Allah be pleased with him) that when the Prophet (peace and blessings be upon him) sneezed, he would cover his face with his hand or his garment, and with that he would lower his voice. Tirmidhi, Abu Dawood, and Imam Tirmidhi said: This hadith is Hasan Sahih. Its chain is Hasan, narrated by Tirmidhi and Abu Dawood.