One who says, “This is my son,” is believed. [If he said,] “This is my brother,” he is not believed, but he must share his portion with him. [If] he died, the possessions return to their place. [If] possessions fell to him from another source, his brothers in-herit with him.  [If] one died, and a will was found tied to his thigh, it is void. [If] he granted title to someone else with it, whether from the heirs or not, his words are upheld.