Let It Rain" by Bishop Paul S. Morton
Key of C
G,A,C,D / G,A,C,D
C / G-C-E Open the flood gates of
G / G-B-D Heaven
B / A-D-F Let
E / Ab-C-D-G it
A / A-C-E rain
A / A-C-E Let
G / G-B-D it
F / F-A-C rain
(repeat)
PS: I've found that if you replace the A with A-minor, it sound pretty good.