'Abdullah bin Sa'id reported: The Apostle of Allah (ﷺ) led us in the morning prayer in Makkah and began Sarat al-Mu'minin (xxiii) but when he came to the mention of Moses (ؑ) and Aaron (verse. 45) or to the mention of Jesus (verse 50), a cough got the better of him, and he bowed. 'Abdullah bin Sa'ib was present there, and in the hadith narrated by Abdul Razzaq (the words are): He cut short (the recitation) and bowed.
Hadith Commentary:Benefits and Issues: This hadith establishes that, in case of necessity, it is permissible to interrupt the recitation (qira’ah) in the middle, and it is not obligatory to complete the surah. According to Imam Nawawi rahimahullah, without necessity, not completing the surah is permissible according to the majority (jumhur), but it is contrary to what is preferable (khilaf awla), meaning it is better to complete the surah. The well-known opinion of Imam Malik rahimahullah is that interrupting the recitation in the middle is disliked (makruh).
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 1022
Abdullah bin al-Saib said; the Messenger of Allah ﷺ led us in the morning prayer at Makkah. He began to recite Surah al-Mu;minin and while he came to description of Moses and Aaron or the description of Moses and Jesus the narrator Ibn Abbad doubts or other narrators differed amongst themselves on this word the prophet ﷺ coughed and gave up (recitation) and then bowed Abdullah bin al-Saib was present seeing all this incident.
Shaykh Umar Farooq Saeedi
649. Commentary: This hadith is a completion of the subject matter of the very first hadith.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 649
´It was narrated that ‘Abdullah bin Sa’ib said:` “The Messenger of Allah (ﷺ) recited Al-Mu’minun [Al-Mu’minun 23] in the Subh prayer, and when he came to the mention of ‘Eisa, he was overcome with a cough, so he bowed in Ruku’.”
Maulana Ataullah Sajid
Benefits and Issues: ➊ The mention of Isa (alayhis salam) occurs in Surah Al-Mu’minun, verse (50), where three rukus are completed. It appears that the Messenger of Allah (sallallahu alayhi wa sallam) wished to continue reciting, but due to coughing, he ended the recitation. This also supports Hadith 818, in which the recitation of sixty to one hundred verses is mentioned.
➋ This narration also proves that it is not obligatory to recite an entire surah in prayer.
➌ If, during the recitation, the imam faces such an impediment that continuing the recitation becomes difficult, he should end the recitation and proceed to bowing (ruku’).
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 820