'Mouth of the Lord' in the Bible

but if you refuse and rebel, you shall be devoured with the sword; for the mouth of the LORD has spoken it."

The glory of the LORD shall be revealed, and all flesh shall see the salvation of God; for the mouth of the LORD has spoken it."

then you shall delight yourself in the LORD; and I will make you to ride on the high places of the earth; and I will feed you with the heritage of Jacob your father:" for the mouth of the LORD has spoken it.

The nations shall see your righteousness, and all kings your glory, and you shall be called by a new name, which the mouth of the LORD shall name.