Mishkat al-Masabih 13 Marriage كتاب النكاح 282

وَعَن سهلِ بنِ الحَنظلِيَّةِ قَالَ: مَرَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِبَعِيرٍ قَدْ لَحِقَ ظَهْرُهُ بِبَطْنِهِ فَقَالَ: «اتَّقُوا اللَّهَ فِي هَذِهِ الْبَهَائِمِ الْمُعْجَمَةِ فَارْكَبُوهَا صَالِحَة واترُكوها صَالِحَة» . رَوَاهُ أَبُو دَاوُد

Sahl b. al-Hanzaliya told of God’s Messenger coming upon an emaciated camel and saying, “Fear God regarding these dumb animals. Ride them when they are in good condition and let them free when they are in good condition.” Abu Dawud transmitted it.