It's from the book of Zephaniah:
"The Lord thy God in the midst of thee is mighty; he will save, he will rejoice over thee with joy; he will rest in his love, he will joy over thee with singing" (Zeph. 3:17).
Just for fun, listen to the way it's phrased in a couple other translations:
NLT: "For the Lord your God is living among you. He is a mighty savior. He will take delight in you with gladness. With His love, He will calm all your fears. He will rejoice over you with joyful songs."
ESV: "The Lord God is in your midst, a mighty one who will save; he will rejoice over you with gladness; he will quiet you with his love; he will exult over you with loud singing."
Do you think for just a few minutes, you can imagine that those words are true about you? Imagine that the Lord really does rejoice over you. That He takes delight in you. That He wants to not only quiet you with His love, but exult over you with loud singing. Can you picture Him joyfully singing at the top of His lungs? For some reason, I love that visual image so much. It's a picture that I'm going to try very hard to savor in the days ahead.
He really does love us. I hope we never forget it.