Mishkat al-Masabih 992
Rifa'a b. Rafi‘ said :
I prayed behind God's Messenger, and on sneezing I said, “Praise be to God, great, good, blessed and abounding in good, as our Lord wishes and is pleased with.” When God's Messenger finished his prayer he moved away and asked, “Who was it who spoke during the prayer?” but no one replied. He asked a second time, but no one replied. He asked a third time, and Rifa'a said, “I did, Messenger of God.” Thereupon the Prophet said, “By Him in whose hand my soul is, over thirty angels raced to it to see which of them would ascend with it.” 

Tirmidhi, Abu Dawud and Nasa’i transmitted it.
وَعَن رِفَاعَة بن رَافع قَالَ: صليت خَلْفَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَعَطَسْتُ فَقلت الْحَمْدُ لِلَّهِ حَمْدًا كَثِيرًا طَيِّبًا مُبَارَكًا فِيهِ مُبَارَكًا عَلَيْهِ كَمَا يُحِبُّ رَبُّنَا وَيَرْضَى فَلَمَّا صَلَّى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ انْصَرَفَ فَقَالَ: «مَنِ الْمُتَكَلِّمُ فِي الصَّلَاةِ؟» فَلَمْ يَتَكَلَّمْ أَحَدٌ ثُمَّ قَالَهَا الثَّانِيَةَ فَلَمْ يَتَكَلَّمْ أَحَدٌ ثُمَّ قَالَهَا الثَّالِثَةَ فَقَالَ رِفَاعَةُ: أَنَا يَا رَسُولَ اللَّهِ. فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «وَالَّذِي نَفْسِي بِيَدِهِ لَقَدِ ابْتَدَرَهَا بِضْعَةٌ وَثَلَاثُونَ مَلَكًا أَيُّهُمْ يَصْعَدُ بِهَا» . رَوَاهُ التِّرْمِذِيّ وَأَبُو دَاوُد وَالنَّسَائِيّ