King Benjamin concludes this segment of his speech by bearing his testimony that his words are true. They are not his words. They are the words of the Lord. When one speaks according to the Spirit, one speaks scripture, as the Lord confirmed in modern-day revelation:
And this is the ensample unto them, that they shall speak as they are moved upon by the Holy Ghost.
And whatsoever they shall speak when moved upon by the Holy Ghost shall be scripture, shall be the will of the Lord, shall be the mind of the Lord, shall be the word of the Lord, shall be the voice of the Lord, and the power of God unto salvation.
Behold, this is the promise of the Lord unto you, O ye my servants (D&C 68:3–4).