Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "When anyone of you is in doubt about his prayer, not knowing how much he prayed, three or four, let him dispel the doubt and build upon what he is certain about, then perform two prostrations before making Taslīm. If he has prayed five, they will make his prayer even-numbered, and if he has prayed exactly four, they will be humiliation for the devil."
Authentic hadith
Narrated by Muslim
Tāriq ibn Ashīm al-Ashja‘i (may Allah be pleased with him) reported: I heard the Messenger of Allah (may Allah’s peace and blessings be upon him) say: "Whoever says 'lā ilāha illa Allah (there is no god but Allah)' and disbelieves in everything worshiped besides Allah, his property and blood becomes inviolable, and his reckoning will be with Allah."
Authentic hadith
Narrated by Muslim
Mu‘āwiyah (may Allah be pleased with him) reported: I heard the Prophet (may Allah's peace and blessings be upon him) say: "When Allah intends good for someone, He grants him the understanding of the religion. Indeed, I am only a distributor, and Allah is the Giver. This Ummah will continue to follow Allah's laws, not being harmed by those who oppose them, until Allah's command comes to pass."
Authentic hadith
Narrated by Bukhari & Muslim
Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Allah does not accept the prayer of any of you who is in the state of Hadath (minor ritual impurity) until he performs ablution."
Authentic hadith
Narrated by Bukhari & Muslim
Abu Hurayrah (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) was asked about the foremost deed that leads people to Paradise, and he replied: "Fear of Allah and good character." Then, he was asked about the things that most lead people to Hellfire, and he said: "The tongue and the private parts."
Good and authentic hadith
Narrated by At-Termedhy & Ibn Majah & Ahmad
Anas (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Strive against the polytheists with your properties, souls, and tongues."
Authentic hadith
Anas ibn Mālik (may Allah be pleased with him) reported: As the Prophet (may Allah's peace and blessings be upon him) was riding a mount with Mu‘ādh behind him, he said: "O Mu‘ādh ibn Jabal!" He replied: "Here I am at your service, O Messenger of Allah." He again said: "O Mu‘ādh!" Mu‘ādh replied: "Here I am at your service, O Messenger of Allah." This was said three times. Then, the Prophet (may Allah's peace and blessings be upon him) said: "There is no one who bears witness that there is no god but Allah and that Muhammad is His slave and Messenger, sincerely from his heart, except that Allah will make him forbidden to Hellfire." He said: "O Messenger of Allah, should I not inform the people of that so that they may rejoice?" He replied: "Then they would rely on this alone." Mu‘ādh narrated this Hadīth at the time of his death to avoid the sin of concealing knowledge.