Hadith 4:739
Ibn Numayr narrated to us, from Ubayd Allah ibn Umar, from Nafi, from Ibn Umar, that the Prophet (may Allah bless him and grant him peace) said: "The month is like this, and like this, and like this." Then he folded his thumb, meaning twenty-nine.
حدثنا بن نمير عن عبيد الله بن عمر عن نافع عن بن عمر أن النبي صلى الله عليه وسلم قال الشهر هكذا وهكذا وهكذا ثم تعقد إبهامه يعني تسعا وعشرين