Highly off-topic but maybe someone can help, The title rang bells for a bit but turns out the wrong ones.

There was a track I heard by terry callier (not collier) which had 3 chords (not 4), repeated slowly over and over, and sung over. I loved it, does anyone have any idea what that may be. I did some digging but never found it again.

Please flag if too far OT, thanks.