This is a very short form of Psalm 18, as it is used in the liturgy of the Church.
I love you, O LORD, my strength,
O LORD, my rock, my fortress, my deliverer.
My God, my rock of refuge,
my shield, the horn of my salvation, my stronghold!
Praised be the LORD, I exclaim,
and I am safe from my enemies.
The breakers of death surged round about me,
the destroying floods overwhelmed me;
The cords of the nether world enmeshed me,
the snares of death overtook me.
In my distress I called upon the LORD
and cried out to my God;
From his temple he heard my voice,
and my cry to him reached his ears.