Al-Adab Al-Mufrad, Book 40, Hadith 936 (English) ⓘ
Makhul al-Azdi said, "I was beside Ibn 'Umar when a man sneezed on one side of the mosque. Ibn 'Umar said, 'May Allah have mercy on you if you praised Allah.'"
حَدَّثَنَا عَارِمٌ، قَالَ: حَدَّثَنَا عُمَارَةُ بْنُ زَاذَانَ قَالَ: حَدَّثَنِي مَكْحُولٌ الأَزْدِيُّ قَالَ: كُنْتُ إِلَى جَنْبِ ابْنِ عُمَرَ، فَعَطَسَ رَجُلٌ مِنْ نَاحِيَةِ الْمَسْجِدِ، فَقَالَ ابْنُ عُمَرَ: يَرْحَمُكَ اللَّهُ إِنْ كُنْتَ حَمِدْتَ اللَّهَ.
also referenced under: Hadith 936 (Reference) & Book 40, Hadith 936 (In-Book)