12 - "Mukhtasar Sunan Abi Dawud" by the great memorizer of hadith, the eminent scholar Zaki al-Din 'Abd al-'Azim ibn 'Abd al-Qawi al-Mundhiri, who died in the year (656 AH). It was printed in Hyderabad in the year (1342 AH), and printed in Delhi in the year (1891 CE), then printed in Cairo in the year (1369 AH) with the critical editing of the two professors Ahmad Muhammad Shakir and Muhammad Hamid al-Fiqi.

13 - "Tahdhib Sunan Abi Dawud wa Idah Mushkilatih" by the versatile scholar Muhammad ibn Abi Bakr ibn Ayyub ibn Sa'd al-Zur'i al-Dimashqi, known as Ibn Qayyim al-Jawziyyah, who died in the year (751 AH). His "Tahdhib" is more like a gloss than a refinement, for in it he discussed a number of hadiths and left many hadiths without commenting on them at all. It was printed in the Ansar al-Sunnah al-Muhammadiyyah Press in Cairo, in the margin of "Mukhtasar al-Mundhiri."

14 - The commentary of Imam Siraj al-Din 'Ali ibn al-Mulaqqin, who died in the year (804 AH), on the additions of "al-Sunan" over "al-Sahihayn," which comprises two volumes. His student, the memorizer Ibn Hajar, mentioned it(1).

15 - The memorizer Abu 'Ali al-Husayn ibn Muhammad ibn Ahmad al-Jayyani al-Andalusi, who died in the year (498 AH), authored a work on naming the teachers of Abu Dawud from whom he narrated in the book "al-Sunan," arranging their names alphabetically. It is printed by Dar al-Kutub al-'Ilmiyyah in Beirut, with the critical editing of Abu Hajar Muhammad al-Sa'id ibn Basyuni Zaghlul, in the year (1418 AH).

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(1) In "al-Majma' al-Mu'assas" 2/319.