NET
9 Do not be like an unintelligent horse or mule, which will not obey you unless they are controlled by a bridle and bit.
Darby
9 Be ye not as a horse, as a mule, which have no understanding: whose trappings must be bit and bridle, for restraint, or they will not come unto thee.
KJV
9 Be ye not as the horse, [or] as the mule, [which] have no understanding: whose mouth must be held in with bit and bridle, lest they come near unto thee.