عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ إِيَّاكُمْ وَالْخَيْلَ الْمُنَفَّلَةَ فَإِنَّهَا إِنْ تَلْقَ تَفِرَّ وَإِنْ تَغْنَمْ تَغْلُلْ
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Beware of those horses which become a cause of booty for their owners, because in such a case, if you are confronted, you will flee, and if you obtain booty, you will commit treachery.