Narrated Ibn 'Abbas:"A man said 'O Messenger of Allah! Which deed is most virtuous to Allah?' He said: 'Al-Hallul-Murtahil'' He said: 'What is Al-Hallul-Murtahil?' He said: 'The one who recites from the beginning of the Qur'an to the end of it, every time he sets out (on a trip)

English translation · Jami' at-Tirmidhi