Whoever gives thought to the word will discover good,
and blessed is he who trusts in the LORD.
The wise of heart is called discerning,
and sweetness of speech increases persuasiveness.
Good sense is a fountain of life to him who has it,
but the instruction of fools is folly.
The heart of the wise makes his speech judicious
and adds persuasiveness to his lips.
Gracious words are like a honeycomb,
sweetness to the soul and health to the body.
(Proverbs 16:20-24 ESV)
Continue steadfastly in prayer, being watchful in it with thanksgiving. At the same time, pray also for us, that God may open to us a door for the word, to declare the mystery of Christ, on account of which I am in prison—that I may make it clear, which is how I ought to speak.
Walk in wisdom toward outsiders, making the best use of the time. Let your speech always be gracious, seasoned with salt, so that you may know how you ought to answer each person.
(Colossians 4:2-6 ESV)