Hadith.5692 - Musa ibn Bakr narrated from Zurarah, from Abu Jafar Imam Muhammad ibn Ali Al-Baqir عليه السلام, who said: "The inheritance of the child of mula'anah belongs to his mother. If his mother is not alive, then it goes to the closest relatives on his mother's side - his maternal uncles."
The author of this book, may Allah سبحانه وتعالى have mercy on him, stated: When the Imam is absent, the inheritance of the child of mula'anah belongs entirely to his mother. However, when the Imam is present and apparent, one-third of the inheritance goes to the mother, and the remaining portion belongs to the Imam of the Muslims. This is supported by related narrations.