Matthew 12:34
You brood of snakes! how can you, bad as you are, utter anything good? For the mouth says only what the heart is full of.
Matthew 10:27
What I tell you in the dark you must say in the light, and what you hear whispered in your ear, you must proclaim from the housetops.
Matthew 28:18-20
And Jesus came up to them and said, "Full authority in heaven and on the earth has been given to me.
Mark 16:15
And he said to them, "Go to the whole world and proclaim the good news to all the creation.
Acts 18:9-10
One night the Lord said to Paul in a vision, "Do not be afraid! Go on speaking and do not give up,
Romans 10:14-17
But how are they to call upon him if they have not believed in him? And how are they to believe him if they have never heard him? And how are they to hear unless someone preaches to them?
Romans 15:18-21
For I will venture to speak only of what Christ has accomplished through me in winning the heathen to obedience, by word and action,
Ephesians 4:29
No bad word must ever pass your lips, but only words that are good and suited to improve the occasion, so that they will be a blessing to those who hear them.
2 Timothy 2:2
The things you learned from me before many witnesses you must commit to trustworthy men who will be capable of teaching others.
James 3:6
And the tongue is a fire, a world of wrong the tongue proves in our bodies, soiling the whole body and setting fire to the whole round of nature, and set on fire itself by hell.