The Dead Sea Scrolls may not be the oldest scripture found. These amulets were discovered in 1979 but just now confirmed as dating from the seventh or sixth century B.C. The inscription reads:

May the Lord bless you and keep you; may the Lord cause his face to shine upon you and be gracious to you; may the Lord lift up his countenance upon you and grant you peace.

This text is from Numbers 6:24-26 and is invoked at the end of Christian and Jewish liturgy.