Praying in congregation

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "A man's praying in congregation is superior to his praying alone by twenty-odd degrees." In one narration the words are: "It is superior by twenty-five degrees." In one narration the words are: "All of those degrees will be like his prayer." In one narration the words are: "Each of them will be like his praying in his own house."
Imam Ahmad, Imam Abu Ya'la, Imam al-Bazzar and Imam al-Tabarani in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat recorded it, and it is he who recorded the words "in his own house"; he recorded these words in al-Mu'jam al-Kabir. The narrators of Imam Ahmad are thiqat (trustworthy).

Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Praying in congregation is superior to praying alone by twenty-seven degrees." (Allamah al-Haythami says:) I say: A hadith reported from Sayyiduna Abu Hurayrah (may Allah be pleased with him) is in the Sahih, in which twenty-five degrees are mentioned.
Imam Ahmad recorded it, and its narrators are the narrators of the Sahih.

Sayyiduna Anas (may Allah be pleased with him) narrates this saying of the Prophet (peace and blessings be upon him): "Prayer in congregation is superior to praying alone (the narrator is unsure; perhaps the words are:) to a man's praying by himself, twenty-five times over."
Imam al-Bazzar and Imam al-Tabarani in al-Mu'jam al-Awsat recorded it; the narrators of Imam al-Bazzar are thiqat (trustworthy).

Sayyiduna Abdullah bin Zayd (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Indeed, Allah Almighty and His angels send down mercy upon those who join the rows, and between praying alone and (praying) in congregation there is a difference of twenty-five degrees."
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat and al-Mu'jam al-Kabir; its chain contains a narrator, Musa bin Ubaydah, who is da'if (weak).

Sayyiduna Suhayb (may Allah be pleased with him) narrates this saying of the Prophet (peace and blessings be upon him): "A man's praying in congregation is superior to his praying alone by twenty-five degrees."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain contains a narrator who has not been named.

Sayyiduna Zayd bin Thabit (may Allah be pleased with him) says: I heard the Prophet (peace and blessings be upon him) say: "Praying in congregation is superior to a man's praying alone by twenty-four degrees." (The narrator says:) That is, his prayer will become twenty-five times over.
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator, al-Rabi' bin Badr, who is da'if (weak).

Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Praying in congregation is superior to a man's praying alone by twenty-five degrees."
Imam al-Bazzar recorded it, and Imam al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator, Abd al-Hakim bin Mansur, who is da'if (weak).

Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) says: I heard the Prophet (peace and blessings be upon him) say: "Indeed, Allah Almighty is pleased with the offering of prayer in congregation."
Imam Ahmad recorded it, and its chain is hasan (good).

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: I heard the Prophet (peace and blessings be upon him) say: "Indeed, Allah Almighty is pleased with prayer in congregation."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain is hasan (good).

Sayyiduna Qabath bin Ashyam al-Laythi (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "Two men praying in such a way that one of them leads the other is purer in the sight of Allah Almighty than four people praying separately; and four men praying in such a way that one of them leads is purer in the sight of Allah Almighty than eight men praying separately; and eight men praying in such a way that one of them leads is purer in the sight of Allah Almighty than one hundred people praying separately."
Imam al-Bazzar and Imam al-Tabarani in al-Mu'jam al-Kabir recorded it; the narrators of Imam al-Tabarani have been declared trustworthy.

Abu Salamah bin Abd al-Rahman says that he heard Sayyiduna Abu Hurayrah (may Allah be pleased with him) and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) saying: We heard the Prophet (peace and blessings be upon him) say in his last sermon: "Whoever keeps regularly offering these five obligatory prayers in congregation will be among the first to cross over the Sirat, who will pass like gleaming lightning; Allah Almighty will raise him in the first group of the followers; and the one who guards these (prayers) will receive, in every day and night, a reward like that of a thousand martyrs who were slain in the path of Allah Almighty."
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Baqiyyah bin al-Walid, who is a mudallis (one who conceals defects in the chain), and he has transmitted this report with 'an'anah (using the word "from").

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) said: "Whoever would be pleased to present himself before Allah Almighty tomorrow as a Muslim should regularly offer the five prayers where the call to prayer is given for them."
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat through Rijlah, the slave-woman (mawlah) of Abd al-Karim, from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both). I have not found anyone who has written a biography of her.