What was the Latin inscription which Bach wrote at beginning of his pieces?

The Latin inscription that Bach wrote at the beginning of his pieces is: "Soli Deo Gloria" (S. D. G.), which translates to "to the glory of God alone." This inscription reflects Bach's deep Christian faith and his desire to glorify God through his music. Bach was a devout Lutheran and his music was often inspired by his religious beliefs. He believed that music was a gift from God and that it should be used to praise Him. The inscription "Soli Deo Gloria" served as a reminder of this purpose and as a dedication of his work to God.