Charles Ellicott Commentary Psalms 144:2

"My lovingkindness, and my fortress, My high tower, and my deliverer; My shield, and he in whom I take refuge; Who subdueth my people under me." — Psalms 144:2 (ASV)

My goodness—Or, my lovingkindness, or my grace, a shortened form of “God of my grace” (Psalms 59:10; Psalms 59:17). The expression is exactly analogous to the term “grace,” applied to kings as the source of grace or mercy. For the other epithets, see Psalm 18:2.

Who subdueth—Psalms 18:47; but the verb is different (cognate with 2 Samuel 22:48), and here the singular, “my people,” instead of “my peoples.” Some manuscripts indeed have the plural here, and the Syriac and Chaldee followed them, or changed to suit Psalm 18:0. If we had the historical incidents from which the psalm arose, we might account for the change.