I met ‘Uqbah b. Muslim and said to him: it has been reported to me that someone has narrated to you from the prophet (ﷺ) that when he entered the mosque, he would say: I seek refuge in Allah, the Magnificent, and in His noble face, and in his eternal domain, from the accursed Devil. He asked : is it so much only? I said: Yes. He said: when anyone says so. The devil says: he is protected from me all the day long.

Abu Qatadah reported the Messenger of Allah (May peace be upon him) as saying; when any one of you enters the mosque, he should pray two RAKAHS before sitting down.

then he may remain sitting (after praying two RAKAHS) or may go for his work.

O Allah, forgives him; O Allah, have mercy on him.

Nothing prevents one from going home to one’s family except prayer.

O Allah, forgive him? O Allah, take mercy on him, until he turns away, or he is defiled. He was asked: what is meant by defilement? He replied: he breaks wind gently or loudly.

Abu Hurairah reported the Messenger of Allah (May peace be upon him) as saying; one shall have the thing the for which one comes to the mosque.

I heard the Messenger of Allah (May peace be upon him) as saying; if anyone hears a man crying out in the mosque about something he has lost, he should say: May Allah not restore it to you, for the mosque were not built for this.

Spitting in the mosque is a sin and it is expiated by burying the spittle.

The Messenger of Allah (ﷺ) said: Spitting in the mosque is a sin and it is expiated by burying the spittle.

The Messenger of Allah(ﷺ) said: Spitting phlegm in the mosque... The narrator then transmitted the rest of the tradition to the same effect.

The Messenger of Allah(ﷺ) said: if anyone enters the mosque, and spits in it, or ejects phlegm, he should remove some earth and bury it there. If he does not do so, then he should spit in his clothes and not come out with it.

The Messenger of Allah (ﷺ) said: When a man stands with the intention of saying prayer, or if any of you says prayer, he should not spit before him, nor at his right side; but he should do so at his left side, if there is a place for it; or he should spit under his left foot and then rub it off.

One day while the Messenger of Allah(ﷺ)was giving sermon he suddenly saw phlegm on the wall towards the qiblah(the direction to which Muslims turn in prayer) of the mosque. So he became angry at people. He then scraped it and sent for saffron and stained with it. He then said: When any one of you prays, Allah, the Exalted, faces him: he, therefore, should not spit before him.

The Prophet(ﷺ) liked the twigs of the date-palm, and he often had one of them in his hand. He entered the mosque and saw phlegm in the wall towards qiblah and he scraped it. He then turned towards people in anger and said: Is any one of you is pleased to spit in his face? When any of you faces qiblah, he indeed faces his Lord, the Majestic the Glorious: the angels are at right side. Therefore, he should not spit on his right side or before him towards qiblah. He should spit towards his left side or beneath his foot. If he is in a hurry, he should do so-and-so. Describing it Ibn ‘Ajlan said: He should spit in his cloth and fold a part of it over the other.

A man led the people in prayer. He spat towards qiblah while the Messenger of Allah (ﷺ) was looking at him. The Messenger of Allah said to the people when he finished his prayer: He should not lead you in prayer (henceforth).

Thenceforth he intended to lead them in prayer, but they forbade him and informed him of the prohibition of the Messenger of Allah (ﷺ). He mentioned it to the Messenger of Allah (ﷺ) who said to him: Yes.

The narrator said: I think he (the Prophet) said: You did harm to Allah and His Apostle.

I came to the Messenger of Allah(ﷺ) who was saying prayer. He spat beneath his left foot.

“He then rubbed it with his shoe."

AbuSa'id said: I saw Wathilah ibn al-Asqa' in the mosque of Damascus. He spat at the mat and then rubbed it with his foot. He was asked: Why did you do so? He said: Because I saw the Messenger of Allah (ﷺ) doing so.

We came to Jabir ibn Abdullah who was sitting in his mosque. He said: The Messenger of Allah (ﷺ) came to us in this mosque and he had a twig of date-palm of the kind of Ibn Tab. He looked and saw phlegm on the wall towards qiblah. He turned to it and scraped it with the twig.

He then said: Who of you likes that Allah turns His face from him? He further said: When any of you stands for praying, Allah faces him. So he should not spit before him, nor on his right side. He should spit on his left side under his left foot. If he is in a hurry (i.e. forced to spit immediately), he should do with his cloth in this manner. He then placed the cloth on his mouth and rubbed it off.

He then said: Bring perfume. A young man of the tribe stood and hurried to his house and returned with perfume in his palm. The Messenger of Allah (ﷺ) took it and put it at the end of the twig. He then stained the mark of phlegm with it.

Jabir said: This is the reason you use perfume in your mosques.