Al-Kāfi - Volume 4 > Prohibition of Saying ‘Ramadan’ Instead of the ‘Month of Ramadan’
Hadith #2

2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنْ هِشَامِ بْنِ سَالِمٍ عَنْ سَعْدٍ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلاَم) قَالَ كُنَّا عِنْدَهُ ثَمَانِيَةَ رِجَالٍ فَذَكَرْنَا رَمَضَانَ فَقَالَ لا تَقُولُوا هَذَا رَمَضَانُ وَلا ذَهَبَ رَمَضَانُ وَلا جَاءَ رَمَضَانُ فَإِنَّ رَمَضَانَ اسْمٌ مِنْ أَسْمَاءِ الله عَزَّ وَجَلَّ لا يَجِي‏ءُ وَلا يَذْهَبُ وَإِنَّمَا يَجِي‏ءُ وَيَذْهَبُ الزَّائِلُ وَلَكِنْ قُولُوا شَهْرُ رَمَضَانَ فَإِنَّ الشَّهْرَ مُضَافٌ إِلَى الاسْمِ وَالاسْمُ اسْمُ الله عَزَّ ذِكْرُهُ وَهُوَ الشَّهْرُ الَّذِي أُنْزِلَ فِيهِ الْقُرْآنُ جَعَلَهُ مَثَلاً وَعِيداً.

2. A number of our people have narrated from Ahmad ibn Muhammad from Ahmad ibn Muhammad ibn abu Nasr from Hisham ibn Salim from Sa‘d who has said the following: “Once, we eight people were in the presence of abu Ja’far, ‘Alayhi al-Salam. We spoke of Ramadan. The Imam said, ‘You must not say, “This is Ramadan or Ramadan is gone or Ramadan has come.” Ramadan is one of the names of Allah, the Most Majestic, the Most Glorious, which does not come or go. What comes or goes is what is not durable. You instead should say, “The month of Ramadan.” The word “month” in this case is used in a possessive case in relation to the noun, the “name,” the name that is the name of Allah, the Most Majestic, the Most Glorious. This month is the one when the Holy Quran was revealed, and He has made it a festival and an example.’”