Hadith.5420 - Harun ibn Muslim narrated from Masadah ibn Ṣadaqah from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام from his father, Imam Muhammad ibn Ali Al-Baqir عليه السلام from his forefathers (peace be upon them), who said that Imam Ali ibn Abi Talib عليه السلام said:
"Injustice in a will is among the major sins."
