He was mistaken in what he said, for Professor al-Sawwās has described it and clarified that it belongs to Ibn Abī Dāwūd al-Sijistānī, not to his father.

Then, upon our return to the catalogues of the manuscripts of the Egyptian Dār al-Kutub, which Professor Fuʼād Sayyid compiled(1), it becomes clear to us that these copies referred to by the Academy of Islamic Research are all of the book "al-Baʿth" (The Resurrection), which Ibn Abī Dāwūd al-Sijistānī authored.

This is supported by the fact that Ibn al-Nadīm, al-Qāsim ibn Yūsuf al-Tujībī, and al-Dhahabī(2) have mentioned that the book "al-Baʿth wa-l-Nushūr" (The Resurrection and the Raising) is among the works of Abū Bakr ibn Abī Dāwūd al-Sijistānī.

His Death:
After a life full of earnestness, diligence, and benefaction, death came to Abū Dāwūd. He died on the night of Friday, the sixteenth of Shawwāl, in the year two hundred and seventy-five (AH 275). His death occurred in Basra, where he resided, and ʿAbbās ibn ʿAbd al-Wāḥid al-Hāshimī(3) led the funeral prayer over him. He was buried beside the grave of Sufyān al-Thawrī—may God Almighty have vast mercy upon him.

--------------------------------------------
(1) The first section, p. 105.
(2) Ibn al-Nadīm in "al-Fihrist," p. 288; al-Qāsim al-Tujībī in his "Barnāmaj," p. 251; and al-Dhahabī in "Siyar Aʿlām al-Nubalāʼ," 13/223.
(3) al-Khaṭīb in "Tārīkh Baghdād," 9/58–59; Ibn ʿAsākir in "Tārīkh Dimashq," 7/folio 549–500; and Ibn Kathīr in "al-Bidāya wa-l-Nihāya," 11/59.