John Gill Commentary 2 Samuel 22:3

"God, my rock, in him will I take refuge; My shield, and the horn of my salvation, my high tower, and my refuge; My saviour, thou savest me from violence." — 2 Samuel 22:3 (ASV)

The God of my rock; in him will I trust: [he is] my shield ,
and the horn of my salvation, my high tower, and my refuge, my saviour ;
you save me from violence.] (See Gill on Psalms 18:2).