Abu Dawud

461. Commentary:
➊ Imam Tirmidhi rahimahullah has termed this narration as "gharib" (rare), but Imam Ibn Khuzaymah rahimahullah has declared it "sahih" (authentic). Allamah Khattabi rahimahullah reports that Imam Bukhari rahimahullah and others say that Mutalib bin Abdullah did not hear from any Companion. Furthermore, there is also criticism regarding Abdul Majeed bin Abdul Aziz. In any case, the virtue of cleaning and maintaining the mosque is established from other authentic narrations. For example, a female Companion had made it her routine to clean the mosque, so the Messenger of Allah sallallahu alayhi wa sallam went to her grave and offered her funeral prayer there. [صحيح بخاري، حديث : 458]
➋ Similarly, memorizing the Noble Qur'an and then forgetting it can also fall under the category of abandonment (mahjoori), and thus this too can be blameworthy.

Commentary:
Note:
(In the chain of narration, both Matlub and Ibn Jurayj are mudallis narrators and have narrated with 'an'anah. Furthermore, there is also a discontinuity (inqita') in the chain between Matlub and Anas. See Da'if Abi Dawud: 1/164)

208 Lexical Explanation:
«عُرِضَتْ » is a third person, passive verb. It means: were made apparent, were brought forth.
«أُجُورُ أُمَّتِي» This is the deputy subject (na'ib fa'il) of «عُرِضَتْ ». The record of deeds of my ummah (community).
«عَلَيَّ» The "ya" here is emphasized (mushaddad). The "ya" of «جرعلى» has been assimilated into the first person "ya" (ya' al-mutakallim).
«اَلْقَذَاةُ » The "qaf" has a fatha, and the "dhal" is light (mukhaffaf). It refers to a straw or similar thing, which falls into a drink, or gets into the eye, or is commonly found inside houses.
«وَاسْتَغْرَبَهُ» It has been called "gharib" (uncommon/isolated).

Benefits and Issues:
➊ From this hadith, it is understood that even the smallest of deeds are not devoid of reward and recompense.
➋ Islam has greatly emphasized the cleanliness and purity of mosques. Even a straw should not be left in the mosque. Whoever performs such a minor act (removing a straw and throwing it outside), he will certainly receive a reward for it.
➌ Imam Tirmidhi rahimahullah has called this hadith "gharib" because in its chain of narration is Matlib bin Abdullah, who narrates from Anas radi Allahu anhu, whereas Matlib did not hear from Anas radi Allahu anhu, nor from any other companion. Nevertheless, the virtue of cleaning and purifying the mosque is established from other authentic narrations, such as the incident where a female companion had made cleaning the mosque her regular practice, so the Messenger of Allah sallallahu alayhi wa sallam went to her grave and performed her funeral prayer there. [صحيح بخاري/الصلاة : ح 458]