See also Testimony
To bear witness by the power of the Holy Ghost; to make a solemn declaration of truth based on personal knowledge or belief.
The Comforter shall testify of me, John 15:26.
He commanded us to preach and to testify, Acts 10:42.
Three witnesses shall testify to the truth, 2 Ne. 27:12.
The power of the Holy Ghost carrieth it unto the hearts of the children of men, 2 Ne. 33:1.
The scriptures testify of Christ, Jacob 7:10–11 (John 5:39).
I testify unto you that I do know that these things whereof I have spoken are true, Alma 5:45 (Alma 34:8).
Ye shall testify of them by the power of God, D&C 17:3–5.
That which the Spirit testifies unto you, ye should do, D&C 46:7.
I sent you out to testify and warn, D&C 88:81.