Sunan Abi Dawud Book 15, Hadith 72
The Messenger of Allah (ﷺ) 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.
Abu Hurairah said “The Prophet (ﷺ) disapproved the shikal horses. Shikal are the horses that are white on their right hind leg and white on their left foreleg or white on their right foreleg and left hind leg.
Abu Dawud said “This means alternate legs”.
‘Abd Allaah bin Jafar said “The Apostle of Allaah(ﷺ) seated me behind him(on his ride) one day, and told me secretly a thing asking me not to tell it to anyone. The place for easing dearer to the Apostle of Allaah(ﷺ) was a mound or host of palm trees by which he could conceal himself. He entered the garden of a man from the Ansar(Helpers). All of a sudden when a Camel saw the Prophet (ﷺ) it wept tenderly producing yearning sound and it eyes flowed. The Prophet (ﷺ) came to it and wiped the temple of its head. So it kept silence. He then said “Who is the master of this Camel? Whose Camel is this? A young man from the Ansar came and said “This is mine, Apostle of Allaah(ﷺ).” He said “Don’t you fear Allaah about this beast which Allaah has given in your possession. It has complained to me that you keep it hungry and load it heavily which fatigues it.”