"Whoever builds a mosque not desiring to show off or for reputation, Allāh will build for him a house in Paradise." It was recorded by al-Ṭabarānī in "al-Muʿjam al-Awsaṭ" (8/5/7001) through the route of Muḥammad ibn ʿĪsá ibn Sumayʿ from al-Muthanná ibn al-Ṣabbāḥ from ʿAṭāʾ from ʿĀʾishah from the Prophet (ṣallá Allāhu ʿalayhi wa-sallam): ... and he mentioned it. He said: "No one narrated it from al-Muthanná except Muḥammad ibn ʿĪsá, and it was exclusively narrated by Hishām ibn ʿAmmār, and no one narrated it from ʿAṭāʾ from ʿĀʾishah except Kathīr ibn ʿAbd al-Raḥmān al-Kūfī and al-Muthanná ibn al-Ṣabbāḥ." I said: al-Dhahabī said in "al-Kāshif" regarding al-Muthanná: "Abū Ḥātim and others said: Weak in ḥadīth." And al-Ḥāfiẓ said in "al-Taqrīb": "Weak, and he became confused later in life." I said: Someone like him can be used as supporting evidence, if Allāh wills, and Ibn Maʿīn indicated this by saying: "His ḥadīth is written and not abandoned." Similarly, the narrator from him, Muḥammad ibn ʿĪsá ibn Sumayʿ, about whom al-Dhahabī said in "al-Mughnī": "Abū Ḥātim said: He is not relied upon. Ibn ʿAdī said: There is no harm in him." As for Hishām ibn ʿAmmār, he is trustworthy and one of the shaykhs of al-Bukhārī, but there is known criticism about him. As for Kathīr ibn ʿAbd al-Raḥmān al-Kūfī mentioned by al-Ṭabarānī as following Ibn al-Ṣabbāḥ, he is al-ʿĀmirī the muʾadhdhin, and al-Ṭabarānī also included his ḥadīth in "al-Awsaṭ" (7/304/6582)