“I was sitting with Ibn ‘Abbas, and a man came to him and he said: ‘Where have you come from?’ He said: ‘From Zamzam.’ He said: ‘Did you drink from it as you should?’ He said: ‘How is that?’ He said: ‘When you drink from it, turn to face the Qiblah and mention the name of Allah, drink three draughts and drink your fill of it. When you have finished, then praise Allah.’ The Messenger of Allah (saw) said: ‘The sign (that differentiates) between us and the hypocrites is that they do not drink their fill from Zamzam.”

“Mu’adh bin Jabal Al-Ansari led his companions in the ‘Isha’ prayer and he made it long. A man among us went away and prayed by himself. Mu’adh was told about that and he said: ‘He is a hypocrite.’ When the man heard about that, he went to the Messenger of Allah (saw) and told him what Mu’adh had said to him. The Prophet (saw) said: ‘Do you want to be a cause of Fitnah (trial, tribulation), O Mu’adh? When you lead the people in prayer, recite “By the sun and its brightness,”[Ash-Shams 91] and “Glorify the Name of your Lord the Most High,” [Al-A’la 87] and “By the night as it envelopes,” [Al-Lail 92] and “Recite in the Name of your Lord.’”[Al-‘Alaq]

“Marwan appointed Abu Hurairah in charge of Al-Madinah, and set out for Makkah. Abu Hurairah led us in prayer on Friday, and he recited Surat Al-Jumu’ah in the first Rak’ah, and in the second, ‘When the hypocrites come to you,” [Al-Munafiqun (63)] ‘Ubaidullah said: “I caught up with Abu Hurairah when he finished and said to him: ‘You recited two Surah that ‘Ali used to recite in Kufah.’ Abu Hurairah said: ‘I heard the Messenger of Allah (saw) reciting them.’”

Jabir (ra) said that (once) a bad smelling wind blew in the times of the prophet Ig. The Messenger of Allah (saws) said," The hypocrites are backbiting the Muslims. That is why this wind blows"

Ibn Abbās reported that the Messenger of Allah ﷺ would recite, in the morning prayer of Jumu’ah (Friday), Sūrat as-Sajdah in the first rakʿah, and Sūrat al-Insān in the second rakʿah, and he used to recite in Jumu’ah prayer Sūrat al-Jumu’ah and al-Munāfiqūn.” Reference: Sahih Muslim 879a

"The Messenger of Allah was in Ji'ranah and he was distributing gold nuggets and spoils of war which were in Bilal's lap. A man said: 'Do justice, O Muhammed!' He said: 'Woe to you! Who will do justice after me if I do not do justice?' 'Umar said: 'O Messenger of Allah! Let me strike the neck of this hypocrite!' The Messenger of Allah said: 'This man has some companions who recite the Qur'an but it does not go any deeper than their collarbones. They will pass through Islam like an arrow passing through its target.'"

"Allah's Messenger would recite: By the sun and its brightness, or similar Surah for the latter Isha (prayer)."

that the Messenger of Allah (SAW) said: "The sign of a hypocrite is that whenever he speaks he lies, and whenever he makes a promise he does not fulfill it, and if he is entrusted he betrays."

Anas reported God’s messenger as saying, “When a man is placed in his grave and his friends leave him, he hears the beat of their sandals. Then two angels come to him and, having made him sit up, they say, ‘What was your opinion of this man, of Muhammad?’ The believer replies, ‘I testify that he is God’s servant and messenger.’ He is then told to look at his abode in hell for which God has substituted for him an abode in paradise, and he sees them both. The hypocrite and infidel are asked, ‘What was your opinion of this man?’ and reply, ‘I do not know; I held the opinion others held.’ They will retort, ‘You neither knew nor did you follow [the believers].’ He will then be given a blow with iron hammers and will utter a shout which will be heard by all who are near him, with the exception of men and jinn.” (Bukhari and Muslim. The wording is Bukhari’s.)

“We were participating in a battle along with the Messenger of Allah, and there were some people from the Bedouins with us. So we all rushed toward some water and the Bedouins raced us to it. One of the Bedouins beat his companions to it and he (tried to obstruct) the pond, he placed rocks around it and he put a leather sheet over it until his companions came.” He said: “A man among the Ansar reached the Bedouin and he dropped the reigns of his camel to drink, but the Bedouin would not allow him. So he started removing the barriers around the water, but the Bedouin raised a stick beating the Ansari man on the head, and smashed it. He went to Abdullah bin Ubayy, the head of the hypocrite, to inform him – he was in fact one of his companions. So Abdullah bin Ubayy became enraged, the he said: ‘Do not spend anything on whoever is with Muhammad until they depart.’ Meaning the Bedouins. They were preparing food for the Messenger of Allah. So Abdullah said: ‘When they depart from Muhammad, then bring Muhammad some food, and let him and whoever is with him eat it.’ Then he said to his companions: ‘If we return to Al-Madinah, indeed the more honorable will expel therefrom the meaner.’” Zaid said: “And I was riding behind the Messenger of Allah, and I had heard Abdullah bin Ubayy, so I informed my uncle who went to tell the Messenger of Allah. He sent a message to him (Abdullah) but he took an oath and denied it.” He said: “So the Messenger of Allah accepted what he said and did not believe me. So my uncle came to me and said: ‘You only wanted the Messenger of Allah to hate you, and the Muslims to say that you lied.’” He said: “I suffered such worry as has not been suffered by anyone else.” He said: “(Later) while I was on the move with the Messenger of Allah on a journey, my mind was relieved of worry, since the Messenger of Allah came to me and rubbed my ear and smiled in my face. I would never be happier than with that as long as the world remained. Then Abu Bakr caught up to me, and said: ‘What did the Messenger of Allah say to you?’ I said: ‘He did not say anything to me, he only rubbed my ear and smiled in my face.’ He said: ‘Receive the good news!’ Then Umar caught up with me and I said the same to him as I had said to Abu Bakr. In the morning the Messenger of Allah recited Surat Al-Munafiqin.”

"Marwan left Abu Hurairah in charge of Al-Madinah and he went to Makkah. So Abu Hurairah led us in Salat in Friday, reciting Surah Al-Jumuah (in the first Rak'ah) and in the second prostration (Rak'ah): When the hypocrites come to you." Ubaidullah said: "So I caught up with Abu Hurairah and said to him: 'You recited two Surah that Ali recited in Al-Kufah. Abu Hurairah said: 'Indeed I heard Allah's Messenger reciting them.'"