This is what the Bible has to say (NKJV):
Psalm 23:1-3 - "The LORD is my shepherd; I shall not want. He makes me to lie down in green pastures; He leads me beside the still waters. He restores my soul ..."
Psalm 131:2 - "Surely I have calmed and quieted my soul, like a weaned child with his mother, like a weaned child is my soul within me."
Psalm 4:4 - "Meditate within your heart on your bed, and be still."
Psalm 37:7 - "Rest in the LORD, and wait patiently for Him."
Matthew 11:28-30 - "Come to Me, all you who labor and are heavy laden, and I will give you rest. Take My yoke upon you and learn from Me, for I am gentle and lowly in heart, and you will find rest for your souls. For My yoke is easy and My burden is light."
Hebrews 4:9-11 - "There remains therefore a rest for the people of God. For he who has entered His rest has himself also ceased from his works as God did from His. Let us therefore be diligent to enter that rest."
Isaiah 40:29-31 - "He gives power to the weak, and to those who have no might He increases strength. Even the youths shall faint and be weary, and the young men shall utterly fall, but those who wait on the LORD shall renew their strength. They shall mount up with wings like eagles. They shall run and not be weary; they shall walk and not faint."
Psalm 27:14 - "Wait on the Lord; be of good courage, and He shall strengthen your heart. Wait, I say, on the Lord!"
Proverbs 1:33 - "But whoever listens to Me will dwell safely, and will be secure, without fear of evil."
Luke 10:39 - "And she had a sister called Mary, who also sat at Jesus' feet and heard His word."
Hosea 2:14 - "Therefore, behold, I will allure her. I will bring her into the wilderness and speak comfort to her"