Bow down thine ear to me - As He does who inclines His ear toward one whom He is willing to hear, or whom He is desirous of hearing. See the notes at Psalms 17:6.
Deliver me speedily - Without delay. Or, hasten to deliver me. It is right to pray to be delivered from all evil; equally right to pray to be delivered immediately.
Be thou my strong rock - Margin: “to me for a rock of strength.” See Psalms 18:1-2, note; Psalms 18:46, note.
For an house of defense to save me - A fortified house; a house made safe and strong. It is equivalent to praying that he might have a secure abode or dwelling-place.