Abu Dawud

Benefits and Issues:
➊ The mentioned narration is weak in its chain of transmission.
However, from authentic ahadith, it is found that there are 15 prostrations (sajdahs) mentioned in the Noble Qur’an.
Whereas the Hanafis and Shafi‘is hold the opinion of 14 prostrations.
The Hanafis accept only one prostration in Surah al-Hajj.
Whereas, from the ahadith, the evidence for two prostrations in Surah al-Hajj is established.
Although these ahadith are weak in their chains,
Hafiz Ibn Kathir rahimahullah states that there are some supporting narrations for them,
which strengthen each other. (Tafsir Ibn Kathir, Surah al-Anbiya, Ayah: 18)
Furthermore, the scholar of the era, Shaykh al-Albani rahimahullah, has also declared it authentic. (Ta‘liqat al-Mishkat, al-Salat, Hadith: 1030)
Also, the hadith of Abu Dawud in which two prostrations in Surah al-Hajj are mentioned,
our researcher has declared it hasan (good).
See:
(Sunan Abi Dawud, Hadith: 1402)
for its verification and referencing.
The Shafi‘is do not accept the prostration of Surah Sad.
Whereas, in Sahih al-Bukhari, there is a narration that Ibn ‘Abbas radi Allahu anhu said:
I saw the Noble Prophet sallallahu alayhi wa sallam performing the prostration of Surah Sad. (Sahih al-Bukhari, Sujud al-Qur’an, Hadith: 1069)
In conclusion, from the ahadith, it is found that there are 15 prostrations mentioned in the Noble Qur’an.
Therefore, while reciting the Noble Qur’an, it is recommended (mustahabb) to perform prostration at 15 places.