"Eternal Father, Strong to Save"

I already wrote a post on the Biblical sources for "Eternal Father, Strong to Save," but while I was reading Psalm 31 last week, I ran across a passage that seems to be related.  Psalm 31:2 is "Incline your ear to me; rescue me speedily!  Be a rock of refuge for me, a strong fortress to save me!"  There's a definite similarity between the phrase "a strong fortress to save me" and the first line of the hymn ("Eternal Father, strong to save"), but I'm not sure whether this is coincidental or intentional.