Allah's Messenger said: "Whoever says, when he hears the Mu'adh-dhin: (Wa Ana Ashadu An La Ilaha Illallah, Wahdahu La Sharika Lahu, Wa Anna Muhammadan Abduhu Wa Rasuluhu, Radittu Billahi Rabban Wa Bil-Islam Dinan, Wa Bi Muhammadin Rasulan) 'I too testify that none has the right to be worshiped but Allah, Alone without partners, and that Muhammad is His slave and Messenger, I am pleased with Allah as my Lord, with Islam as my religion and Muhammad as a Messenger.' - Allah will pardon his sins for him."
Allah's Messenger said: "Whoever says, when he hears the call: (Allahumma, rabba hadhihidda 'watit-tammati was Salatilqa'imah, ati Muhammadanil wasilata wal-Fadilata, wab'athhu Maqamun Mahmudan alladhi wa'adtahu) 'O Allah! Lord of this perfect call and established prayer, grant Muhammad Al-Wasilah and Al-Fadilah, and raise him to the praised station that you promised him' - then intercession on the Day of Resurrection is made lawful for him."
"On the Night of Isra, fifty prayers were made obligatory upon the Prophet. Then it was decreased until it was made five. Then it was called out: 'O Muhammad! Indeed My Word does not change; these five prayers will be recorded for you as fifty.'"
Allah's Messenger said: "The five prayers, and Al-Jumuah (the Friday prayer) to Al-Jumuah are atonement for what is between them, as long as the major sins have not been committed."
the Prophet said: "I was about to order my boys to collect bundles of firewood, then order Salat to be held, then burn (the homes) of the people who did not attend the Salat."
"Ibn Abbas was asked about a man who fasted during the day and stood (in prayers) during the night, but he did not attend the Friday prayer nor congregational prayer. He replied: 'He is in the Fire.'"