Ibn ‘Umar said that when the Muslims came to Medina they gathered and sought to know the time of prayer, but no one summoned them. One day they discussed the matter, and one of them said, “Use something like the bell of the Christians." Another said, “Use a horn like that of the Jews." But when ‘Umar said, “I suggest that you send a man to announce the prayer," God’s Messenger said, “Get up, Bilal, and summon to prayer." (Bukhari and Muslim.)

a man who gives God and his patron their due, a man who leads people in prayer to their satisfaction, and a man who summons people to the five times of prayer every day and night.” Tirmidhi transmitted it and said that it is a gharib tradition.

a supplication when the call to prayer is made, and in stress when people are locked in battle.” A version has “and when rain is falling”. Abu Dawud and Darimi transmitted it, but Darimi did not mention “and when rain is falling”.

Jabir said that he heard the Prophet say, “When the devil hears the summons to prayer he goes off till he is as far away as ar-Rauha’.” The transmitter said that ar-Rauha’ is thirty-six miles from Medina. Muslim transmitted it.

We were with God’s Messenger when Bilal got up and made the call to prayer. When he finished, God’s Messenger said, “If anyone says the same as this sincerely, he will enter paradise.” Nasa’i transmitted it.

Ibn ‘Umar reported God’s Messenger as saying, “If anyone calls the adhan for twelve years, paradise is guaranteed to him; sixty blessings will be recorded for him for every day’s calling of the adhan and thirty blessings for every iqama.” Ibn Majah transmitted it.

He also told of God's Messenger saying to them, “Pray as you have seen me prayer, and when the time for prayer comes one of you should call the adhan for you and the oldest of you should act as imam.”* * In this tradition the plural is used throughout; in the preceding the dual is used, two persons being referred to.(Bukhari and Muslim.)

God's Messenger entered the Ka'ba with Usama b. Zaid, ‘Uthman b. Talha al-Hajabi, and Bilal b. Rabah, and locking it behind him, he remained inside. I asked Bilal when he came out what God's Messenger had done, and he said, “He took up a position with one pillar on his left, two on his right, and three behind him (the House at that time having six pillars), then performed salat.” (Bukhari and Muslim.)

Abu Huraira reported God’s Messenger as saying, “The parts of the land dearest to God are its mosques, and the parts most hateful to God are its markets.” Muslim transmitted it.

‘Uthman reported God's Messenger as saying, “If anyone builds a mosque for God, God will build a house for him in paradise.” (Bukhari and Muslim.)

He also reported God’s Messenger as saying, “A man's prayer in company is twenty-five times as valuable as his prayer in his house and his market, for when he performs ablution, doing it well, then goes out to the mosque, having no other reason than prayer for going out, he does not take a step without being raised a degree for it and having a sin remitted for it, and when he prays the angels continue to invoke blessings on him as long as he is in his place of prayer, saying, ‘God bless him; God show mercy to him.’ And each of you continues to be engaged in prayer as long as he is waiting for the prayer.” In a version he said, “When he enters the mosque prayer holds him fast.” And he added in the invocation of the angels, “O God, forgive him, O God, turn towards him, as long as he does not do any harm in it and as long as he does not do anything unseemly in it.” (Bukhari and Muslim.)

When any of you enters the mosque he should say, “O God, open to me the gates of Thy mercy, “and when he goes out he should say “O God, I ask Thee out of Thine abundance.” Muslim transmitted it.

Abu Huraira reported God's Messenger as saying, “If anyone hears a man crying out in the mosque about something he has lost, he should say, ‘May God not restore it to you,’ for the mosques were not built for this.” Muslim transmitted it.

Jabir reported God’s Messenger as saying, “If anyone eats of this offensive tree* he must not approach our mosque, for the angels are harmed by the same things as men.” * Bukhari At’ima, 49, shows the Prophet’s objection to onions and garlic. One of these may be meant here.(Bukhari and Muslim.)

Abu Huraira reported God’s Messenger as saying, “When one of you gets up for prayer he must not spit in front, of him, because he is holding intimate converse with God as long as he is in his place of prayer; nor must he spit towards his right, for there is an angel at his right; but he may spit towards his left or under his feet and bury it.” The version of Abu Sa'id has “under his left foot.” (Bukhari and Muslim.)

Jundub told of his hearing the Prophet say, “Those who preceded you used to take the graves of their prophets and righteous men as mosques, but you must not take graves as mosques; I forbid you to do that.” Muslim transmitted it.

Mu'awiya said on the authority of his father that God’s Messenger forbade these two plants, i e., onions and garlic, and said, “He who eats them must not come near our mosque.” He also said, “If you must eat them, suppress their odour* by cooking.” * Lit. put them to death.Abu Dawud transmitted it.

As-Sa'ib b. Yazid said that when he was sleeping in the mosque a man threw a pebble at him, and when he looked he saw that it was ‘Umar b. al-Khattab, who said, “Go and bring me these two men.” He brought them and ‘Umar asked them what tribe they belonged to, or what place they came from. On their replying that they belonged to at-Ta’if, he said, “If you had belonged to Medina I would have given you a beating for raising your voices in the mosque of God’s Messenger. Bukhari transmitted it.

Malik said that ‘Umar built a courtyard called al-Butaiha’ in the neighbourhood of the mosque and said, “If anyone wants to make a noise, or recite poetry, or raise his voice, he must go out to this courtyard.” He transmitted it in al-Muwatta'.

Anas b. Malik reported God’s Messenger as saying, “A man’s prayer in his house is equivalent to a single observance of prayer, his prayer in a tribal mosque is equivalent to twenty-five, his prayer in a mosque in which the Friday prayer is observed is equivalent to five hundred, his prayer in the Aqsa mosque is equivalent to fifty thousand, his prayer in my mosque is equivalent to fifty thousand, and his prayer in the sacred mosque (the Ka’ba) is equivalent to a hundred thousand.” Ibn Majah transmitted it.