Al-Adab Al-Mufrad, Book 40, Hadith 939 (In-Book) ⓘ
Abu Hurayra said, "Wish mercy on a person once, twice and three times. Anything more than that is a cold."
حَدَّثَنَا قُتَيْبَةُ، قَالَ: حَدَّثَنَا سُفْيَانُ، عَنِ ابْنِ عَجْلاَنَ، عَنِ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ قَالَ: شَمِّتْهُ وَاحِدَةً وَثِنْتَيْنِ وَثَلاَثًا، فَمَا كَانَ بَعْدَ هَذَا فَهُوَ زُكَامٌ.
also referenced under: Hadith 939 (Reference) & Book 40, Hadith 939 (English)