Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2542
Narrated Sahl ibn al-Hanzaliyyah:
The Apostle of Allah (peace_be_upon_him) came upon an emaciated camel and said: Fear Allah regarding these dumb animals. Ride them when they are in good condition and feed them when they are in good condition.