The wife of the Messenger, Sayyidah Aisha (may Allah be pleased with her), says: The prayer that was initially made obligatory upon the Messenger of Allah (peace and blessings be upon him and his family) was two rak'ahs each, except for Maghrib, which was three rak'ahs. Then Allah Almighty completed the prayers of Dhuhr, Asr, and Isha to four rak'ahs each in residence, and the initially prescribed (two rak'ahs) were fixed for travel.
Hadith Referenceالفتح الربانی / أبواب صلاة السفر وآدابه وأذكاره وما يتعلق به / 2345
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«أخرجه البخاري: 350، ومسلم: 685، وابوداود: 1198، (انظر مسند أحمد ترقيم الرسالة: 26869 ترقیم بيت الأفكار الدولية: 26869»