What If His People Prayed by Casting Crowns is in Ab at 122 beats per minute and runs 3:21 across 65 bars. It uses 11 chords — Eb, Ebsus, Ab, Dbsus2, Cm7, Absus2, Bb, Fm9, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? What If His People Prayed guitar melody tab.