Book Name:Allah Walon Ki Seerat
٭Always avoid using foul and indecent language. Refrain from swearing. Remember! Swearing at a Muslim without Shar’i permission is absolutely Haraam. (Fatawa Razawiyyah, vol. 21, pp. 127) And Heaven is Haraam [forbidden] for the one using obscene language.
صَلُّوۡا عَلَى الۡحَبِيۡب صَلَّى اللّٰهُ تَعَالٰى عَلٰى مُحَمَّد