The only true peace is found in God through Jesus Christ

I will both lie down in peace, and sleep, for You alone, O LORD, make me dwell in safety. (Psalm 4:8)

For to be carnally minded is death, but to be spiritually minded is life and peace. (Romans 8:6)

For the fruit of the Spirit is love, joy, peace, longsufering, kindness, goodness, faithfulness. (Galatians 5:22)

Now the fruit of righteousness is sown in peace by those who make peace. (James 3:18)