1؎: By this is meant the first nine days of Dhu al-Hijjah. This hadith is among those narrations which are interpreted, because fasting during these nine days is not disliked but rather recommended (mustahabb), especially the fast of the Day of Arafah (the day when the pilgrims stand in the plain of Arafat), for which great virtue has been mentioned in the ahadith. It is possible that the Prophet sallallahu alayhi wa sallam may not have fasted at some time due to illness or travel, and also, Aisha radi Allahu anha not having seen him fast does not necessarily mean that he never fasted during these days.
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues: By "the ten days of Dhul-Hijjah" is meant the first nine days of Dhul-Hijjah. Fasting during these days is highly recommended, as has been mentioned in the above ahadith, and in hadith 2437 the practice of the Prophet (sallallahu alayhi wa sallam) is mentioned. As for the statement of Aisha (radi Allahu anha), its meaning is that either the Prophet (sallallahu alayhi wa sallam) was unable to fast due to certain circumstances, or it so happened that Aisha (radi Allahu anha) did not witness him fasting during those days.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2439
´It was narrated from Aswad that ‘Aishah said:` “I never saw the Messenger of Allah (ﷺ) fasting the (first) ten days (of Dhul- Hijjah).”
Maulana Ataullah Sajid
Benefits and Issues: ➊ It is possible that Umm al-Mu’minin radi Allahu anha was not informed that the Prophet sallallahu alayhi wa sallam was fasting on that day. However, Umm al-Mu’minin radi Allahu anha herself used to fast on the Day of ‘Arafah. From this, it is understood that she had learned about the virtue of this fast from other Companions, male or female, radi Allahu anhum.
➋ This hadith can also mean that the Prophet sallallahu alayhi wa sallam did not fast continuously during these days, but rather would fast on some days. And Allah knows best.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 1729