The lips of the righteous know what is acceptable; but the mouth of the wicked is all frowardness.

Provérbios 10:32

He that walketh uprightly, and worketh righteousness, and speaketh truth in his heart;

That hath no slander upon his tongue, nor doeth evil to his fellow, nor taketh up a reproach against his neighbour;

Salmos 15:2,3

Put away from thee a froward mouth, and perverse lips put far from thee.

Provérbios 4:24

Every word of God is tried; He is a shield unto them that take refuge in Him.

Provérbios 30:5

I have chosen the way of faithfulness; Thine ordinances have I set before me .

Salmos 119:30

Keep thy tongue from evil, and thy lips from speaking guile.

Salmos 34:13

Guide me in Thy truth, and teach me; for Thou art the God of my salvation; for Thee do I wait all the day.

Salmos 25:5

For the word of the LORD is upright; and all His work is done in faithfulness.

Salmos 33:4