This is the Oxyrhynchus Hymn, dated to the late 200s AD. It is the earliest known Christian hymn manuscript with both lyrics and musical notation. A plain English rendering of the surviving words:
“Let all creation be silent.
Let the shining stars be still.
Let the rushing winds and rivers cease.
While we sing to the Father, Son, and Holy Spirit,
let every power answer: Amen, amen.
Strength, praise, and glory forever to God,
the only giver of all good things. Amen, amen.”