Virtues of Cleaning the MasjidTaking care of the mosques and tidying the furniture etc inside them is something that is praiseworthy and encouraged. The one who does that will be rewarded by Allaah for this good deed.
Allaah has commanded us to venerate the mosques as He says (interpretation of the meaning):
“In houses (mosques) which Allaah has ordered to be raised (to be cleaned, and to be honoured), in them His Name is remembered [i.e. Adhaan, Iqaamah, Salaah (prayers), invocations, recitation of the Qur’aan]. Therein glorify Him (Allaah) in the mornings and in the afternoons or the evenings,
Men whom neither trade nor sale (business) diverts from the remembrance of Allaah (with heart and tongue) nor from performing As-Salaah (Iqaamat-as-Salaah) nor from giving the Zakaah. They fear a Day when hearts and eyes will be overturned (out of the horror of the torment of the Day of Resurrection)”[al-Noor 24:36-37]al-Suyooti said: In this verse there is the command to venerate the mosques and cleanse them of idle talk and impure things.
[Tafseer al-Qaasimi]
Another sign that points to the virtue of the one who takes care of that is the report in al-Saheehayn from the hadeeth of Abu Hurayrah,
that a black man or a black woman used to take care of the mosque, then he or she died. The Prophet ( ) asked after him (or her) and was told that he had died. He said: “Why did you not inform me? Show me his grave (or her grave).” Then he went to the grave and offered the funeral prayer over it.”[Bukhaaree and Muslim]And it was narrated by Abu Dawood (455), al-Tirmidhi (594) and Ibn Maajah (759) that
‘Aa’ishah said: The Messenger of Allaah ( ) commanded that mosques be built among houses and that they be cleaned and perfumed.”[Aboo Dawood, at-Tirmidhi and Ibn Maajah]What is meant by “among houses” is in neighbourhoods and among tribes.
The Prophet (peace and blessings of Allaah be upon him) regarded spitting in the mosque as a sin and said that the expiation for that was burying it. In al-Saheehayn it is narrated that Anas said:
The Messenger of Allaah said: “Spitting in the mosque is a sin and its expiation is burying it.”[Bukhaaree and Muslim]Al-Nasaa’i (728) and Ibn Maajah (762) narrated from Anas that
the Prophet ( ) saw some sputum in the qiblah of the mosque and he got so angry that his face turned red. Then a woman from among the Ansaar came and scratched it and put some perfume in that place. The Messenger of Allaah (peace and blessings of Allaah be upon him) said: “What a good deed this is.”[an-Nasaa'i and Ibn Maajah]And it was proven that the Prophet (
) removed that himself as was narrated in al-Saheehayn where it says that
‘Aa’ishah said: “He saw some sputum on the wall of the mosque and scratched it off.”[Bukhaaree and Muslim]Abu Dawood (461) and al-Tirmidhi (2916) narrated the hadeeth,
“I was shown the rewards of my ummah for different deeds, even a speck of dirt that someone removes from the mosque.”[Aboo Dawood and at-Tirmidhi]Ibn Maajah (757) narrated a hadeeth,
“Whoever removes anything harmful from the mosque, Allaah will build for him a house in Paradise.”[Ibn Maajah][
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