Al-Muwatta de Malik, 351

On rapporta à Malek, que Al-Kassem Ibn mouhammad, Ourwa Ibn Al-Zoubair et Abou Bakr Ibn Abdel-Rahman, faisaient, en voyageant, des prières surérogatoires». On demanda à Malek, au sujet de la prière surérogatoire en voyage? Il répondit: «Il n'y a aucun mal, à ce qu'elles soient faites, nuit et jour. On m'a même fait savoir, que les hommes versés agissaient ainsi»

Yahya related to me from Malik that he had heard that al-Qasim ibn Muhammad and Urwa ibn az-Zubayr and Abu Bakr ibn Abd ar Rahman used to pray nawafil when travelling. Yahya said that Malik was asked about voluntary prayers when travelling and he said, "There is no harm in them, either at night or during the day. I have heard that some of the people of knowledge used to do that