It is from Psalm 46!
"God is my safe place and He makes me strong. He is always ready to help me when I am in trouble. That is why I will not be afraid even if the whole world disappears and the mountains fall into the ocean. I won't even be afraid if the waters are loud and the mountains are shaking,,, God will help me--just in time. God is my safe place. I will be quiet and know that God is in charge. God is high and exalted above all the world. God is with me. God is my safe place."
This is SUCH a great passage to say aloud together right before bedtime...!