Donkey called 'Ufair

Bukhari :: Book 4 :: Volume 52 :: Hadith 108
Narrated Mu'adh:
I was a companion rider of the Prophet on a donkey called 'Ufair. The Prophet asked, "O Mu'adh! Do you know what Allah's right on His slaves is, and what the right of His slaves on Him is?" I replied, "Allah and His Apostle know better." He said, "Allah's right on His slaves is that they should worship Him (Alone) and should not worship any besides Him. And slave's right on Allah is that He should not punish him who worships none besides Him." I said, "O Allah's Apostle! Should I not inform the people of this good news?" He said, "Do not inform them of it, lest they should depend on it (absolutely)."

Hadith 112
Narrated Abu Huraira:
Allah's Apostle said, " Horses are kept for one of three purposes; for some people they are a source of reward, for some others they are a means of shelter and for some others they are a source of sins. The one for whom they are a source of reward, is he who keeps a horse for Allah's Cause (i.e. Jihad) tying it with a long tether on a meadow or in a garden with the result that whatever it eats from the area of the meadow or the garden where it is tied will be counted as good deeds for his benefit, and if it should break its rope and jump over one or two hillocks then all its dung and its foot marks will be written as good deeds for him; and if it passes by a river and drinks water from it even though he had no intention of watering it, even then he will get the reward for its drinking. As for the man for whom horses are a source of sins, he is the one who keeps a horse for the sake of pride and pretense and showing enmity for Muslims: such a horse will be a source of sins for him. When Allah's Apostle was asked about donkeys, he replied, "Nothing has been revealed to me about them except this unique, comprehensive Verse: "Then anyone who does an atom's (or a small ant's) weight of good shall see it; And anyone who does an atom's (or a small ant's) weight of evil, shall see it.'(101.7-8)