Upon the death of Muhammad, his daughter Fatimah declared her claim to inherit Fadak as the estate of her father. The claim was rejected by the ruling caliph, Abu Bakr, on the grounds that Fadak was public property and arguing that Muhammad had no heirs. Sources report that Ali together with Umm Ayman (Barakah) testified to the fact that Muhammad granted it to Fatimah Zahra, when Abu Bakr requested Fatima to summon witnesses for her claim. Various primary sources contend that Fadak was gifted by Muhammad to Fatima, drawing on the Qur'an as evidence. These include narrations of Ibn 'Abbas who argued that when the Qur'anic verse on giving rights to kindred was revealed, Muhammad called to his daughter and gifted the land of Fadak to her.