Hadith.2466 - A man asked Abu Abdullah (as): "When is it permissible for me to strike the animal I am riding?"
Imam (as) replied: "When it does not walk under you as it would walk toward its feeding trough."
Al-Kāfi #2419“I once asked al-Sadiq (a.s.), ‘When can I hit my stumper?’ He (the Imam) said, ‘You can do so when you are riding and it does not walk as...