Sahih Muslim
Sahih Muslim 1080o
Arabic hadith text
وَحَدَّثَنِيهِ مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا ابْنُ مَهْدِيٍّ، عَنْ سُفْيَانَ، عَنِ الأَسْوَدِ بْنِ قَيْسٍ، بِهَذَا الإِسْنَادِ وَلَمْ يَذْكُرْ لِلشَّهْرِ الثَّانِي ثَلاَثِينَ .
Translation
This hadith was transmitted through the same chain from al-Aswad ibn Qays, but it does not mention thirty days for the second month.