Musannaf Ibn Abi Shaybah 29194 — A man who seeks the help of a slave

Isma'il bin Salim said that al-Sha'bi said: When a man seats an underage boy on his mount and the boy then causes damage, this damage is the responsibility of the one who seated him on the mount. If the boy had reached puberty and then caused any kind of damage, the boy himself will be liable. The same ruling applies to a slave.