Musannaf Ibn Abi Shaybah

A’mash narrates that Ibrahim said regarding the man whose brotherhood is acknowledged by one among several brothers while the rest deny it, that this brother will share in the inheritance with them, just like a slave who is jointly owned by several brothers and one of them frees his share. He says that ‘Amir, Hakam, and their companions used to say that he will be included in the share of the one who acknowledged his lineage.

Ibn Jurayj reports that a man from among the people of Sana'a informed him that Tawus gave a ruling regarding four sons of one father, one of whom testified that his father had acknowledged the lineage of a slave who was among them. Tawus did not validate the acknowledgment of lineage, but instead granted the slave one-fifth of the inheritance from the wealth of the one who testified that his father had acknowledged his lineage, and the slave was set free from the wealth of the one who gave the testimony.

Ibn Sirin narrates that Hazrat Shurayh said regarding the man who acknowledged the lineage of a brother, that his testimony is that he is his brother.

Mansur narrates that Ibrahim said regarding a person who acknowledges the lineage of a brother or sister, that his acknowledgment has no validity until all the heirs acknowledge him as their brother.

Waki’ says that when there are two brothers as heirs and one of them acknowledges a man as their brother while the other denies it, regarding this Ibn Abi Layla used to say that this issue will be resolved from six shares: the one who did not acknowledge the lineage will have three shares, the one who made the claim will have two shares, and the one for whom the claim was made will have one share. It is said that Abu Hanifa used to say that this issue will be resolved from four shares: the one who did not make the claim will have two shares, the one who made the claim will have one share, and the one for whom the claim was made will have one share.