Muwatta Malik, 623

Yahya related to me from Zayd ibn Aslam that his father said that he had heard Umar ibn al-Khattab say, "I once gave a noble horse to carry somebody in the way of Allah, and the man neglected it. I wished to buy it back from him and I thought that he would sell it cheaply. I asked the Messenger of Allah, may Allah bless him and grant him peace, about it and he said, 'Do not buy it, even if he gives it to you for one dirham, for someone who takes back his sadaqa is like a dog swallowing its own vomit

Zaid Ibn Aslam a rapporté que son père a entendu Omar Ibn Al-Khattab dire: «Je fis aumône d'un cheval de race à un homme, pour combattre dans la voie d'Allah. L'homme, chez qui le cheval se trouvait, l'avait mal entretenu; ainsi je voulais me l'acheter à un bon prix. J'ai demandé, à ce sujet l'Envoyé d'Allah (salallahou alayhi wa salam) r (Sur lui la grâce et la paix d'Allah) qui me répondit: «Ne te l'achète pas, même au prix d'un dirham, car, celui qui revient sur son aumône, est à comparer au chien qui revient sur son vomi»