Exodus 4: 10 - 12

¹⁰And Moses said unto the LORD, O my LORD, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech, and of a slow tongue.
¹¹And the LORD said unto him, Who hath made man's mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the LORD?
¹²Now therefore go, and I will be with thy mouth, and teach thee what thou shalt say.

Jeremiah 1: 5 - 8

⁵Before I formed thee in the belly I knew thee; and before thou camest forth out of the womb I sanctified thee, and I ordained thee a prophet unto the nations.
⁶Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child.
⁷But the LORD said unto me, Say not, I am a child: for thou shalt go to all that I shall send thee, and whatsoever I command thee thou shalt speak.
⁸Be not afraid of their faces: for I am with thee to deliver thee, saith the LORD.

Ezekiel 2: 3 - 5

³And he said unto me, Son of man, I send thee to the children of Israel, to a rebellious nation that hath rebelled against me: they and their fathers have transgressed against me, even unto this very day.
⁴For they are impudent children and stiffhearted. I do send thee unto them; and thou shalt say unto them, Thus saith the Lord GOD.
⁵And they, whether they will hear, or whether they will forbear, (for they are a rebellious house,) yet shall know that there hath been a prophet among them.

Acts 4: 18 - 20

¹⁸And they called them, and commanded them not to speak at all nor teach in the name of Jesus.
¹⁹But Peter and John answered and said unto them, Whether it be right in the sight of God to hearken unto you more than unto God, judge ye.
²⁰For we cannot but speak the things which we have seen and heard.

Acts 10: 42 - 43

⁴²And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead.
⁴³To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins.

Matthew 28: 18 - 20

¹⁸And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.
¹⁹Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
²⁰Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.