Ubaydullah bin Adi bin Khiyar (may Allah have mercy on him) says that an Ansari man narrated to him that he came to the Messenger of Allah (peace and blessings be upon him) while he was in a gathering. He whispered something to the Prophet (peace be upon him); in fact, he was seeking permission to kill a man. The Messenger of Allah (peace be upon him) said aloud: "Does he not testify that Allah alone is the true deity?" The Ansari said: "Why not, O Messenger of Allah! But he has no testimony." But the Messenger of Allah (peace be upon him) again said: "Does he not testify that Muhammad (peace be upon him) is the Messenger of Allah?" He said: "Why not, O Messenger of Allah!" Then the Prophet (peace be upon him) said: "Does he not perform prayer?" He said: "Why not, O Messenger of Allah! But he has no prayer." The Messenger of Allah (peace be upon him) said: "But Allah, the Exalted, has forbidden me from (killing) such people."

(Second narration) Ubaidullah bin Adi bin Khiyar (may Allah have mercy on him) also narrates that Abdullah bin Adi Ansari related to him that once the Messenger of Allah (peace and blessings be upon him) was sitting when a man sought permission from him, that is, he whispered to the Messenger of Allah (peace and blessings be upon him). The rest of the narration is similar to the one mentioned above.

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that Sayyiduna ‘Itban (may Allah be pleased with him) developed an ailment in his eye. He sent a message to the Messenger of Allah (peace and blessings be upon him) about the difficulty he was facing and said:“O Messenger of Allah! Please come and pray at a place in my house so that I may make it my place of prayer.”The Messenger of Allah (peace and blessings be upon him) and, according to Allah’s will, a few companions came. The Prophet (peace and blessings be upon him) stood up for prayer and the companions became engaged in conversation. Then they began to mention the troubles caused by the hypocrites and considered Malik bin Dukhshum to be a major cause of it. Meanwhile, the Messenger of Allah (peace and blessings be upon him) finished and said:“Does he not bear witness that there is no god but Allah and that I am the Messenger of Allah?”A man replied:“Yes, he does bear witness to this, but there is no belief in his heart according to it.”The Messenger of Allah (peace and blessings be upon him) said:“Whoever bears witness that Allah alone is the true God and I am His Messenger, then the Fire will never consume him, or (he said) he will never enter the Fire.”

It is narrated from Sayyiduna Miqdad bin Aswad (may Allah be pleased with him), he says: "O Messenger of Allah! What is your opinion regarding this: if I encounter a disbeliever, he fights with me, we both strike each other once, but he strikes my hand with a sword in such a way that he cuts it off, and then, to seek protection from me, he goes behind a tree and starts saying: 'I have become a Muslim for the sake of Allah.' O Messenger of Allah! Should I fight him now?" In another narration: "After he says this, should I kill him or leave him?" The Messenger of Allah (peace and blessings be upon him) said: "Do not kill him. If you kill him, then the state you were in before this killing, that is, your state of Islam, you will enter into his state, and the state he was in before accepting Islam, he will enter into yours."

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "By Him in Whose hand is my soul! Any Jew or Christian of this Ummah who hears about me and then does not believe in that with which I have been sent, he will be among the inhabitants of Hell."

Sayyiduna Abu Musa Ash'ari (may Allah be pleased with him) also narrated a similar hadith from the Noble Prophet (peace and blessings be upon him), except that instead of "he will be among the people of Hell," the words are: "He will not enter Paradise."

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "If ten scholars among the Jews were to believe in me, then every Jew on the face of the earth would believe in me." Sayyiduna Ka'b, may Allah be pleased with him, said: "The reference to twelve is found in Surah Al-Ma'idah."

It is narrated from Rabah bin Abdur Rahman (may Allah have mercy on him) that his grandmother heard from her father (Sayyiduna Sa'id bin Zaid, may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The prayer of a person who does not have ablution is not accepted, and the ablution of a person who does not remember Allah is not accepted, and whoever does not believe in me (Muhammad, peace and blessings be upon him) will not be able to believe in Allah Almighty, and whoever does not love the Ansar will not be able to believe in me."

Abu Muhairiz (may Allah have mercy on him) says: I said to a companion, Abu Jum'ah (may Allah be pleased with him): "Narrate to us a hadith that you heard from the Messenger of Allah (peace and blessings be upon him)." He said: "Yes, I will narrate to you a very excellent hadith. Once we ate the morning meal with the Messenger of Allah (peace and blessings be upon him), and with us was our leader Abu Ubaidah bin Jarrah (may Allah be pleased with him). He said: 'O Messenger of Allah! Can there be anyone better than us? We embraced Islam with you and fought jihad with you.' But the Messenger of Allah (peace and blessings be upon him) said: 'Yes, those people are better who will come after you and will believe in me without having seen me.'"

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "I wish to meet my brothers." The noble Companions (may Allah be pleased with them) said: "Are we not your brothers?" He (peace and blessings be upon him) said: "You are my companions; my brothers are those who will believe in me without having seen me."