Sahih Muslim
Sahih Muslim 1080d
Arabic hadith text
وَحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ عُبَيْدِ اللَّهِ، بِهَذَا الإِسْنَادِ وَقَالَ ذَكَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم رَمَضَانَ فَقَالَ " الشَّهْرُ تِسْعٌ وَعِشْرُونَ الشَّهْرُ هَكَذَا وَهَكَذَا وَهَكَذَا " . وَقَالَ " فَاقْدِرُوا لَهُ " . وَلَمْ يَقُلْ " ثَلاَثِينَ " .
Translation
Ubayd Allah reported through the same chain that the Messenger of Allah mentioned Ramadan and said, “The month is twenty-nine days; the month is like this, this, and this.” He also said, “So estimate it,” but did not say, “thirty.”