Sahih al-Bukhari Book 61, Hadith 149
The Prophet (ﷺ) said, "A horse may be kept for one of three purposes: for a man it may be a source of
reward; for another it may be a means of living; and for a third it may be a burden (a source of
committing sins). As for the one for whom it is a source of reward, he is the one who keeps his horse
for the sake of Jihad in Allah's Cause; he ties it with a long rope on a pasture or in a garden. So
whatever its rope allows it to eat, will be regarded as good rewardable deeds (for its owner). And if it
breaks off its rope and jumps over one or two hillocks, even its dung will be considered amongst his
good deeds. And if it passes by a river and drinks water from it, that will be considered as good deeds
for his benefit) even if he has had no intention of watering it. A horse is a shelter for the one who
keeps it so that he may earn his living honestly and takes it as a refuge to keep him from following
illegal ways (of gaining money), and does not forget the rights of Allah (i.e. paying the Zakat and
allowing others to use it for Allah's Sake). But a horse is a burden (and a source of committing sins for
him who keeps it out of pride and pretense and with the intention of harming the Muslims."
The Prophet (ﷺ) was asked about donkeys. He replied, "Nothing has been revealed to be concerning them
except this comprehensive Verse (which covers everything) :--'Then whosoever has done good equal
to the weight of an atom (or a small ant), Shall see it (its reward) And whosoever has done evil equal
to the weight of an atom (or a small ) ant), Shall see it (Its punishment)." (99.7-8)
The Prophet (ﷺ) said, "There is always goodness in horses."
Allah's Messenger (ﷺ) reached Khaibar in the early morning and the people of Khaibar came out with their spades, and when they saw the Prophet (ﷺ) they said, "Muhammad and his army!" and returned hurriedly to take refuge in the fort. The Prophet (ﷺ) raised his hands and said, "Allah is Greater! Khaibar is ruined ! If we approach a nation, then miserable is the morning of those who are warned."