Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2547
Narrated AbuWahb al-Jushami,:
The Apostle of Allah (peace_be_upon_him) said: Tie the horses, rub down their forelocks and their buttocks (or he said: Their rumps), and put things on their necks, but do not put bowstrings.