١ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ حَدِيدِ بْنِ حَكِيمٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ أَدْنَى الْعُقُوقِ أُفٍّ وَلَوْ عَلِمَ الله عَزَّ وَجَلَّ شَيْئاً أَهْوَنَ مِنْهُ لَنَهَى عَنْهُ.
1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from Muhammad ibn Sinan from Hadid ibn Hakim from Abu ‘Abdillah  who has said the following: “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.” 