Psalm 32:9 in the King James Version
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.
Context
8 I will instruct you and teach you in the way which you shall go. I will counsel you with my eye on you.
9 Don’t be like the horse, or like the mule, which have no understanding, who are controlled by bit and bridle, or else they will not come near to you.
10 Many sorrows come to the wicked, but loving kindness shall surround him who trusts in the LORD.