A man from the family of Khalid bin Asid asked Sayyiduna Ibn Umar (may Allah be pleased with them) that in the Noble Qur'an we find mention of the prayer of fear and the prayer at home, but we do not find mention of the prayer during travel (even though the prayer is shortened during travel?). He replied that when Allah Almighty sent the Messenger of Allah (peace and blessings be upon him), we knew nothing; we will do as we saw him doing.