Historical clue formulations

• "A Mighty Fortress ___ God" (hymn) — 2016-05-05
• "God ___ refuge ...": Psalms — 2010-03-07
• "God ___ refuge" (start of Psalm 46) — 2008-07-16
• "A Mighty Fortress ___ God" (hymn) — 2007-06-28
• "God ___ refuge ...": Psalm 46 — 1997-06-15