The Prophet ﷺ said, "One can ride the mortgaged animal because of what one spends on it, and one can drink the milk of a milch animal as long as it is mortgaged. "
عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ يَقُولُ الرَّهْنُ يُرْكَبُ بِنَفَقَتِهِ وَيُشْرَبُ لَبَنُ الدَّرِّ إِذَا كَانَ مَرْهُونًا