Al-Kāfi
Hadith 307 3ـ وَبِهَذَا الاسْنَادِ عَنْ مُحَمَّدِ بْنِ سِنَانٍ قَالَ سَأَلْتُهُ عَنِ الاسْمَ مَا هُوَ قَالَ صِفَةٌ لِمَوْصُوفٍ.
3. It is narrated through the same chain of narrators (as in the above Hadith) from Muhammad ibn Sinan who has said the following. “I asked the Imam, (perhaps abu al-Hassan al-Rida) about the name (of Allah), ‘What is it?’ The Imam replied, “It is an attribute of the attributes of (Allah).”