Sunan Abi Dawud Book 15, Hadith 66
Utbah heard the Messenger of Allah (ﷺ) say: Do not cut the forelocks, manes, or tails of horse, for their tails are their means of driving flies, their manes provide them with warmth, and blessing is tide to their forelocks.
The Messenger of Allah (ﷺ) said: If anyone fights in Allah's path as long as the time between two milkings of a she-camel, Paradise will be assured for him. If anyone sincerely asks Allah for being killed and then dies or is killed, there will be a reward of a martyr for him. Ibn al-Musaffa added from here: If anyone is wounded in Allah's path, or suffers a misfortune, it will come on the Day of resurrection as copious as possible, its colour saffron, and its odour musk; and if anyone suffers from ulcers while in Allah's path, he will have on him the stamp of the martyrs.
The Messenger of Allah (ﷺ) said: Keep to every dark bay horse with a white blaze and white on the legs, or sorrel with a white blaze and white on the legs , or black with a white blaze and white on the legs.