Etiquette of the mosque
Allah says in the Qur'an:
إِنَّمَا يَعْمُرُ مَسَاجِدَ اللَّهِ مَنْ آمَنَ بِاللَّهِ وَالْيَوْمِ الْآخِرِ وَأَقَامَ الصَّلَاةَ وَآتَى الزَّكَاةَ وَلَمْ يَخْشَ إِلَّا اللَّهَ ۖ فَعَسَىٰ أُولَٰئِكَ أَنْ يَكُونُوا مِنَ الْمُهْتَدِينَ
"He only shall tend Allah's sanctuaries who believeth in Allah and the Last Day and observeth proper worship and payeth the poor-due and feareth none save Allah. For such (only) is it possible that they can be of the rightly guided." (Surah at Tawbah 18)
Keeping the mosque clean.
It was narrated from 'Aishah that the Messenger of Allah commanded that places of prayer be established in villages, and that they be purified and perfumed. (Ibn Majah 759)
Avoiding bad smells.
It was narrated that Jabir said: "The Messenger of Allah (ﷺ) said: Whoever eats of this plant - the first time he said 'garlic' then he said, 'garlic, onions and leeks'  - let him not approach us in our Masjids, for the angels are offended by that which offends mankind." (Sunan an Nasa'i 707)
Walking to the mosque calmly.
Abu Hurairah (May Allah be pleased with him) reported: I heard the Messenger of Allah (ﷺ) saying, “When the Iqamah are pronounced, do not come to it running, you should walk calmly with tranquillity to join the congregation. Then join in what you catch for and complete what you miss.”
[Al-Bukhari and Muslim]. In Muslim it is added: Messenger of Allah (ﷺ) said, “For when one of you is walking for Salat, he is, in fact, engaged in Salat.” (Riyadh As-Salihin Book 2 Hadith 24)
Remembering Allah much.
فَإِذَا قَضَيْتُمُ الصَّلَاةَ فَاذْكُرُوا اللَّهَ قِيَامًا وَقُعُودًا وَعَلَىٰ جُنُوبِكُمْ ۚ فَإِذَا اطْمَأْنَنْتُمْ فَأَقِيمُوا الصَّلَاةَ ۚ إِنَّ الصَّلَاةَ كَانَتْ عَلَى الْمُؤْمِنِينَ كِتَابًا مَوْقُوتًا
"When ye have performed the act of worship, remember Allah, standing, sitting and reclining. And when ye are in safety, observe proper worship. Worship at fixed times hath been enjoined on the believers." (Qur'an 4:103)
Sitting in circles where Allah is remembered.
Anas reported God’s messenger as saying, “When you come upon the pastures of paradise feed on them.” On being asked what the pastures of paradise were he replied that they were circles where God is remembered. (Mishkat al Masabih Book 9, Hadith 46)
Buying and selling.
Narrated Abu Hurairah: That the Messenger of Allah (ﷺ) said: "When you see someone selling or buying in the Masjid then say: May Allah not profit your business. And when you see someone announcing about something lost then say: 'May Allah not return it to you." (Jami'at Tirmidhi 1325)
It was narrated from 'Amr bin Shu'aib from his father that his grandfather said: "The Messenger of Allah forbade buying and selling in the mosque, and reciting poetry in the mosque." (Ibn Majah 749)
Looking for lost property.
Passing in front of someone who is praying.
It was narrated from Busr bin Sa’eed that Zaid bin Khalid sent word to Abu Juhaim Al-Ansari asking him:
“What did you hear from the Prophet (ﷺ) about a man when he is performing prayer?” He said: “I heard the Prophet (ﷺ) saying: If anyone of you knew (how great is the sin involved) when he passed in front of his brother who is performing prayer, then waiting for forty,”
(one of the narrators) said: “I do not know if he meant forty years, forty months, or forty days, ‘would be better for him than that.” (Sunan Ibn Majah Book 5, Hadith 143)
Edited last time by mustafa on 05/20/2021 (Thu) 22:02:31.