أَدْنَى الْعُقُوقِ أُفٍّ وَ لَوْ عَلِمَ اللَّهُ عَزَّ وَ جَلَّ شَيْئاً أَهْوَنَ مِنْهُ لَنَهَى عَنْهُ[1].
“Minimum of al-‘Uquq, (to cause disappointment) is to say ‘Uff (expression of disapproval). Had Allah, the Majestic, the Glorious, known anything expressing a lesser degree of disappointment than this ‘Uff, He would have prohibited it.”