Al-Bayhaqī next reports from Abū ʿUbayd, commenting on the narration of Ibn ʿAbbās:
“We were commanded to construct the mosques jumm and the towns with parapets (sharafan).”
He then clarifies: “jumm are buildings that possess no parapet at all; likewise, any structure lacking a parapet is called ajamm, and its plural is jumm.”

Among the reports is the narration of ʿUbādah ibn al-Ṣāmit who said:
“The Anṣār remarked, ‘How long will the Messenger of Allah, peace and blessings be upon him, pray toward this palm-trunk?’ They gathered some gold dinars, brought them to the Prophet, and said, ‘Shall we renovate this mosque and adorn it?’ He replied, ‘I have no inclination to exceed my brother Moses: a shelter like the shelter of Moses is enough.’”
Al-Ṭabarānī included it in al-Kabīr. In its chain appears ʿĪsā ibn Sinān: Aḥmad and others declared him weak, whereas al-ʿAjlī, Ibn Ḥibbān, and—according to one report—Ibn Kharrāsh considered him trustworthy. I add that al-Taqrīb describes him as layyin al-ḥadīth (of soft, i.e., somewhat weak, narration).

Another narration is from Abū al-Dardāʾ, traced back to the Prophet:
“When you embellish your mosques and gild your Qurʾān manuscripts, ruin will befall you.”
Al-Ḥakīm al-Tirmidhī transmitted it, as did Ibn al-Mubārak in al-Zuhd, both with a weak chain according to al-Fayḍ. Ibn Abī al-Dunyā likewise recorded it in al-Maṣāḥif from Abū Hurayrah as a mawqūf report, with the wording: