Al-Adab Al-Mufrad, Book 9, Hadith 172 (English) ⓘ
Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, "Do not say, 'May Allah make your face ugly.'"
حَدَّثَنَا حَجَّاجٌ، قَالَ: حَدَّثَنَا ابْنُ عُيَيْنَةَ، عَنِ ابْنِ عَجْلاَنَ، عَنْ سَعِيدٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ: لاَ تَقُولُوا: قَبَّحَ اللَّهُ وَجْهَهُ.
also referenced under: Hadith 172 (Reference) & Book 9, Hadith 17 (In-Book)