"Therefore, verily I say unto you, lift up your voices unto this people; speak the thoughts that I shall put into your hearts, and you shall not be confounded before men; For it shall be given you in the very hour, yea, in the very moment, what ye shall say. But a commandment I give unto you, that ye shall declare whatsoever thing ye declare in my name, in solemnity of heart, in the spirit of meekness, in all things. And I give unto you this promise, that inasmuch as ye do this the Holy Ghost shall be shed forth in bearing record unto all things whatsoever ye shall say." (D&C 100:5-8)

--

"Neither take ye thought beforehand what ye shall say; but treasure up in your minds continually the words of life, and it shall be given you in the very hour that portion that shall be meted unto every man." (D&C 84:85)

--

"And when they bring you unto the synagogues, and unto magistrates, and powers, take ye no thought how or what thing ye shall answer, or what ye shall say: For the Holy Ghost shall teach you in the same hour what ye ought to say." (Luke 2:11-12)