Acts 16:25-26 (NKJV)

But at midnight Paul and Silas were praying and singing hymns to God, and the prisoners were listening to them. Suddenly there was a great earthquake, so that the foundations of the prison were shaken; and immediately all the doors were opened and everyone’s chains were loosed.

Additional Scriptures

2 Chronicles 20:21-22 (NKJV)

And when he had consulted with the people, he appointed those who should sing to the Lord, and who should praise the beauty of holiness, as they went out before the army and say: “Praise the Lord, For His mercy endures forever.” Now when they began to sing and to praise, the Lord set ambushes against the people of Ammon, Moab, and Mount Seir, who had come against Judah; and they were defeated.

Psalm 149:6-9 (NKJV)