I cried unto the Lord with my voice; rather, I cry unto the Lord with my voice; i.e. earnestly and constantly (comp. Psalms 77:1; Psalms 142:1). And he heard (rather, hears) me out of his holy hill; or.
"the hilt of his holiness" (comp. Psalms 2:6). Though David is in exile at Mahanaim (2 Samuel 17:24), his thoughts revert to Jerusalem, to the holy hill of Zion, and the ark of God, which he has there" set in its place" (2 Samuel 6:17); and he knows that God, who "dwelleth between the cherubim" (1 Samuel 4:4), will hear him, though so far off.
Selah (see the comment on Psalms 3:2).