It was narrated from Aisha that Abu Bakr led the people in prayer and the Messenger of Allah (ﷺ)was in the row.
“If Abdullah bin Mughaffal heard any one of us recite: ‘In the Name of Allah, the Most Gracious, the Most Merciful’, he would say: ‘I prayed behind the Messenger of Allah (ﷺ) and behind Abu Bakr and behind Umar-may Allah be pleased with them both- and I did not hear any of them recite: ‘In the Name of Allah, the Most Gracious, the Most Merciful.”
“I heard Abu Hurairah say: ‘The Messenger of Allah (ﷺ) said: “Whoever offers a prayer in which he does not recite Umm Al-Quran (Al Fatihah), it is deficient, it is deficient, it is deficient, incomplete.” I (Abu As-Sa’ib) said: ‘O Abu Hurairah, sometimes I am behind the Imam.’ He poked me in the arm and said: ‘Recite it to yourself, O Persian! For I heard the Messenger of Allah (ﷺ) say: “Allah says: “I have divided prayer between Myself and My slave into two halves, and My slave shall have what he has asked for.'” The Messenger of Allah (ﷺ) said: “Recite, for when the slave says: All the praises and thanks be to Allah, the Lord of all that exists, Allah says: ‘My slave has praised Me.’ And when he says: The Most Gracious, the Most Merciful, Allah says: ‘My slave has extolled Me.’ And when he says: The Only Owner (and the Only Ruling Judge) of the Day of Recompense (i.e. the Day of Resurrection), Allah says: ‘My slave has glorified Me’ . And when he says: You (alone) we worship, and You (alone) we ask for help (for each and everything), He says: ‘This is between Me and My slave, and My slave shall have what he has asked for.’ And when he says: ‘Guide us to the straight way, the way of those on whom You have bestowed Your grace, not (the way) of those who earned Your anger, nor of those who went astray, He says: ‘This is for My slave, and My slave shall have what he asked for.'”
The Messenger of Allah (ﷺ) used to say salam to his right:As-salamu ‘alaykum wa rahmatullah (peace be upon you and the mercy of Allah) , until the whiteness of his right cheek could be seen, and to his left: As-salamu ‘alaykum wa rahmatullah (peace be upon you and the mercy of Allah) until the whiteness of his left cheek could be seen.
the Prophet said: “There is no Salat for the one who does not recite Fatihatil-Kitab.”
“Allah’s Messenger prayed the Subh prayer, and he had difficulty with the recitation. When turned (after finishing) he said: ‘I think that you are reciting behind your Imam?'” He said: “We said: ‘Yes, Messenger of Allah, by Allah!’ He said: ‘Do not do that, except for Umm Al-Kitab, for there is no Salat for one who does not recite it.'”
“There are three whose prayer do not rise more than a hand span above their heads: A man who leads people (in prayer) when they do not like him; a woman who has spent the night with her husband angry with her; and two brothers who have severed contact with one another.”
“We were with the Messenger of Allah (ﷺ) on a journey, and the sky was overcast so it was difficult for us to determine the Qiblah. So we performed prayer, and we marked the location.* Later, when the sun reappeared, we realized that we had prayed facing a direction other than the Qiblah. We mentioned that to the Prophet (ﷺ), then the Words were revealed: ‘So wherever you turn there is the Face of Allah.’”
“Which of your two prayers did you intend to be counted (i.e., accepted)?”