This is the CCM group “The Imperials.” The song (which was a hard choice) is “Water Grave.” They recorded a lot of music in the 70s and 80s. They were regarded as “golden,” with a substantial presence in the CCM scene.
From Wikipedia– “The Imperials are an American Christian music group that has been around for over 45 years. Originating as a southern gospel quartet, the innovative group would become pioneers of contemporary Christian music in the 1960s. There have been many changes for the band in membership and musical styles over the years. They would go on to win four Grammys, and be inducted into the Gospel Music Hall of Fame.”
http://en.wikipedia.org/wiki/The_Imperials
They are unquestionably one of the leaders in early CCM. I guess if I was to choose a second song it would be “Sail On” which musically and lyrically is a tremendous song. You’ll have to look for it on YouTube yourself, but it will be worth it, I guarantee it.
Brokenbeliever’s Index of Selected Christian Music can be accessed at:
https://brokenbelievers.com/classic-christian-music-index/
Broken Believers 
Thank you!
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Powerful. A song by them I was not familiar with. It has ministered, more than you can know . . . :-)
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