To what extent are the hadiths valid regarding the virtues of saying "Lā ʾIlāha ʾIllā Allah" (There is no god but Allah), and that its reciter will be resurrected on the Day of Judgment with a face like the moon on the night of its fullness, and that its people will not experience loneliness at death, in their graves, or at the resurrection?

The scholars of Hadith, among them Ibn Adi and Ibn Hibban, mentioned the weakness of the first Hadith. They explained its weakness with reasons, including the presence of Muhammad ibn Sa'id al-Ta'ifi and Bahlul, neither of whom is relied upon as a source. Al-Albani also deemed it weak. As for the second Hadith, it was deemed weak by Al-Mundhiri, Al-Haythami, and Al-Albani, due to the presence of Abd al-Wahhab ibn al-Dahhak, who is abandoned. Regarding the third Hadith, Al-Suyuti considered it hasan (good), and Al-Munawi said: "Its chain of narration is sahih (authentic)." Al-Albani initially authenticated it, then later retracted and deemed it weak.