Narrator:Abdullah ibn Mas‘ūd
حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ، حَدَّثَنَا يَحْيَى بْنُ زَكَرِيَّا بْنِ أَبِي زَائِدَةَ، أَخْبَرَنِي عِيسَى بْنُ دِينَارٍ، عَنْ أَبِيهِ، عَنْ عَمْرِو بْنِ الْحَارِثِ بْنِ أَبِي ضِرَارٍ، عَنِ ابْنِ مَسْعُودٍ، قَالَ
مَا صُمْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم تِسْعًا وَعِشْرِينَ أَكْثَرُ مِمَّا صُمْنَا ثَلاَثِينَ
Ibn Mas`ud said:
"What I fasted with the Prophet that was twenty-nine (days), was more than what we fasted that was thirty." (He said): There are narrations on this topic from `Umar, Abu Hurairah, `A'isha, Sa`d bin Abi Waqqas, Ibn `Abbas, Ibn `Umar, Anas, Jabir, Umm Salamah, Abu Bakrah, that the Prophet (ﷺ) said: "The month is twenty nine (days)."
Reported by At-Tirmidhi (No. 689), Abu Dawud (No. 2322) and Ahmad (No. 3588, 3647, 3677, 4073).