Umm al-Mu’minin Sayyidah Aisha (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) said: Allah Almighty initially made two rak‘ahs obligatory in prayer, both during travel and while residing. Then the prayer during travel was kept in its original state, and an addition was made to the prayers while residing.

Hafs bin Asim (may Allah have mercy on him) says that Sayyiduna Ibn Umar (may Allah be pleased with them both) narrated to us that I have accompanied the Prophet Muhammad (peace and blessings be upon him), and I never saw him offering Sunnah prayers during travel, and Allah, the Exalted, has said: "Indeed, in the Messenger of Allah (peace and blessings be upon him) you have a good example." (__QUR_33:21__)

Sayyiduna Anas (may Allah be pleased with him) narrated that I offered four rak‘ahs of prayer (Zuhr) behind the Prophet (peace and blessings be upon him) in Madinah, and two rak‘ahs of prayer (Asr) at Dhu’l-Hulayfah.

Sayyiduna Anas (may Allah be pleased with him) said that we set out from Madinah with the intention of Makkah in the company of the Prophet (peace and blessings of Allah be upon him), and the Noble Prophet (peace and blessings of Allah be upon him) continued to perform two rak‘ahs (for each prayer) until we returned to Madinah. Yahya bin Abi Ishaq says: I asked,“Did you stay in Makkah for some days?”Sayyiduna Anas (may Allah be pleased with him) replied:“We stayed there for ten days.”