Saved by faith. And how does the righteousness which is by faith speak? Paul quoted Moses, "The Word is near you. It is in your mouth and in your heart so that you may obey it." That's akin to what our Lord said, "If you abide in My Word, you are truly My disciples and you will know the Truth, and the Truth will set you free."
He is our Passover Lamb. And Moses said of the Passover, "This observance will be for you like a sign on your hand and a reminder on your forehead that the law of the Lord is to be on your lips." ("Law" being a synonym for the whole of the revealed will of God - the word, commandments, ways, judgements, precepts, etc, of the Lord.")
Psalm 1, being a partial summation of the Psalms, contrasts the righteous and wicked man. "Blessed is the man who does not 1. Walk in the way of the wicked, 2. Stand in the path of sinners, 3. Sit in the seat of mockers, but his delight is in the law of the Lord, and on His law He meditates day and night. The word translated "meditates" in Hebrew means: to murmur, to ponder; imagine, meditate, study, speak, talk, utter, mutter, roar. It is primarily an utterance.
Faith in Jesus Christ means His Word will come from our lips. As it is written in Isaiah 59, "'As for Me, this is My covenant with them,' says the Lord. 'My Spirit who is on you, and my words that I have put in your mouth will not depart from Your mouth, or from the mouths of Your offspring, or from the mouths of their offspring from this time on and forever,' says the Lord."
I believed, therefore, I spoke.