Yahya bin Talhah bin Ubaydullah narrates from his father that Sayyiduna Umar (may Allah be pleased with him) saw him (Talhah) looking sorrowful and asked: What is the matter with you? Perhaps the leadership of your cousin (Abu Bakr al-Siddiq, may Allah be pleased with him) has displeased you? He replied: No (and he praised Abu Bakr, may Allah be pleased with him); rather, the matter is that I heard the Messenger of Allah (peace and blessings be upon him) saying: "There is a word which no servant says at the time of his death except that Allah relieves his distress and his complexion becomes radiant." Nothing prevented me from asking him (peace and blessings be upon him) about that word except that I felt able to ask it (at any time), until he (peace and blessings be upon him) passed away. At this Umar (may Allah be pleased with him) said: I know that word. Talhah (may Allah be pleased with him) asked: What is it? Umar (may Allah be pleased with him) said: Do you know of any word greater than the word which he (peace and blessings be upon him) commanded his uncle to say, namely 'La ilaha illallah' (There is no god but Allah)? Talhah (may Allah be pleased with him) said: By Allah! That is the very word. This hadith is sahih (authentic) on the condition of the two Shaykhs, but they did not record it. As for the error that Muhammad bin Abd al-Wahhab made in narrating it from Mis'ar (that is a separate matter).

Sayyiduna Uthman bin Affan (may Allah be pleased with him), relating a hadith to Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "I know a word which no servant says truly from his heart and then dies, except that the Fire (of Hell) is made forbidden for him." But the Messenger of Allah (peace and blessings be upon him) passed away without having told us (clearly) about that word. Umar bin al-Khattab (may Allah be pleased with him) said: I will tell you about it; it is the word of sincerity (kalimat al-ikhlas) which the Messenger of Allah (peace and blessings be upon him) commanded his uncle Abu Talib to say at the time of (Abu Talib's) death, namely bearing witness that "there is no god but Allah," and it is the word by which Allah honoured Muhammad (peace and blessings be upon him) and his Companions. This hadith is sahih (authentic) on the condition of the two Shaykhs, but they did not record it with this wording; rather, Imam Muslim alone recorded the narration of Khalid al-Hadhdha' from al-Walid bin Muslim that the Prophet (peace and blessings be upon him) said: "Whoever dies knowing that there is no god but Allah will enter Paradise."