Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrates that the Messenger of Allah (peace and blessings be upon him) mentioned Ramadan and said: Do not begin fasting until you see the moon, and likewise, do not end the fast until you see the moon. And if it is cloudy, then complete thirty days.
Hadith Referenceاللؤلؤ والمرجان / كتاب الصيام / 653
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 30 كتاب الصوم: 11 باب قول النبي صلی اللہ علیہ وسلم إذا رأيتم الهلال فصوموا»
Sayyiduna Ibn Umar narrated that the Prophet Muhammad (peace and blessings be upon him) said: "A month is of such and such and such and such days." By this, he meant thirty days. Then he said: "And such and such and such and such days." His indication was towards twenty-nine days. Once, he pointed towards thirty, and on another occasion, towards twenty-nine.
Hadith Referenceاللؤلؤ والمرجان / كتاب الصيام / 654
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 68 كتاب الطلاق: 25 باب اللعان وقول الله تعالى (والذين يرمون أزواجهم»
Sayyiduna Ibn Umar (may Allah be pleased with them both) narrated that the Prophet Muhammad (peace and blessings be upon him) said: We are an unlettered nation; we neither write nor calculate. The month is like this and like this. He meant sometimes twenty-nine (days) and sometimes thirty (days). (He indicated with all his ten fingers three times.)
Hadith Referenceاللؤلؤ والمرجان / كتاب الصيام / 655
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 30 كتاب الصوم: 13 باب قول النبي صلی اللہ علیہ وسلم لا نكتب ولا نحسب»
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) said, or he said that Abu al-Qasim (peace and blessings be upon him) said: "Begin fasting upon sighting the moon and end fasting upon sighting the moon, and if it is cloudy, then complete thirty days."
Hadith Referenceاللؤلؤ والمرجان / كتاب الصيام / 656
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 30 كتاب الصوم: 11 باب قول النبي صلی اللہ علیہ وسلم إذا رأيتم الهلال فصوموا وإذا رأيتموه فأفطروا»