Jesus is all over Scripture, Old and New Testament alike. Though His Name doesn’t appear in the Old, everything points and finds its fulfillment in Him (see Luke 24.27, 44-45). This is certainly true about Psalm 18:
I will love You, O Lord, my strength. The Lord is my rock and my fortress and my deliverer; My God, my strength, in whom I will trust; My shield and the horn of my salvation, my stronghold. I will call upon the Lord, who is worthy to be praised; so shall I be saved from my enemies.