Hadith 4:737
Muhammad ibn Bishr narrated to us, from Ibn Abi Layla, from Ibn al-Zubayr, from Jabir, who said: The Prophet (may Allah bless him and grant him peace) swore an oath or took an oath for a month, so he ascended to his upper room. When it was the twenty-ninth day, Gabriel came to him and said: "Descend, for the month has been completed."
حدثنا محمد بن بشر عن بن أبي ليلى عن بن الزبير عن جابر قال حلف النبي صلى الله عليه وسلم أو اقسم شهرا فصعد علية فلما كان تسع وعشرون جاءه جبريل ( ( ( جبرائيل ) ) ) فقال انزل فقد تم الشهر