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.’”