محمد بن سنان عن ابن مسكان عن الحسن الصيقل قال: كنت عند أبي عبد الله عليه السلام جالسا فبعث غلاما له أعجميا في حاجة إلى رجل فانطلق ثم رجع فجعل أبو عبد الله عليه السلام يستفهمه الجواب وجعل الغلام لا يفهمه مرارا قال: فلما رأيته لا يتغير لسانه ولا يفهم ظننت ان أبا عبد الله عليه السلام يستغضب عليه قال: وأحد أبو عبد الله عليه السلام النظر إليه ثم قال: أما والله لئن كنت عيي اللسان فما أنت بعيي القلب ثم قال: إن الحياء والعفاف والعي - على اللسان لا على القلب - من الايمان والفحش والبذاء والسلاطة من النفاق.
21.Muḥammad ibn Sinān narrated from Ibn Muskān, from al-Ḥasan al Ṣayqal who said, “I was sitting with Abū ʿAbdillāh  when he sent one of his non-Arab servant boys on an errand to a person. The boy left and then returned so Abū ʿAbdillāh began asking him and seeking an explanation from him, but the young lad did not understand him, and this happened a number of times.” He (the narrator) said, “When I saw that his speech did not change and he was not able to understand, I thought that Abū ʿAbdillāh  would get angry on him. [However,] Abū ʿAbdillāh  looked at him sternly and then said, ‘By Allah, even if you are unable to speak with your tongue, you are not unable to communicate with your heart [and mind]!’ Then he said, ‘Verily modesty, chastity, and inarticulateness – the inarticulateness of the tongue, not of the heart – are part of faith, [1] while immodesty, obscenity and insolence are part of hypocrisy.’”