Royani, Yayan Muhammad. “Hate Speech During the Caliphate of ‘Alī Ibn Abī Ṭālib and Its Relevance to Regulations in Indonesia: The Study of the Islamic Law History”. Al-Ahkam, vol. 31, no. 2, Oct. 2021, pp. 223-40, doi:10.21580/ahkam.2021.31.2.8956.