Zephaniah 3:17 says: 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.
(KJV).
The verse appears near the close of Zephaniah, in a passage addressed to Jerusalem. Read it in context at Zephaniah 3:17, or the full chapter at Zephaniah 3.