Two slaves freed for raising voice before mother
Whenever you see your mother or father coming, stand up with respect. Don’t talk to them meeting their eyes. Whenever they call you, reply to them instantly saying ‘Labbayk’ (I am here). Talk to them in a very polite manner. Never raise your voice totheirs. Once Sayyidunā ‘Abdullāĥ Bin ‘Awn’s mother called him. While replying to her, his voice rose slightly. So he رَحْمَةُ اللهِ تَعَالٰی عَلَيْه freed two slaves, making up for it.
(Ḥilya-tul-Awliyā, vol. 3, pp. 45, Ḥadīš 3103)
صَلُّوۡا عَلَى الۡحَبِيۡب صَلَّى اللّٰهُ تَعَالٰى عَلٰى مُحَمَّد