Written and first recorded by Delaney & Bonnie & Friends (US #13 1971).
Other hit version by The New Seekers (UK #2/IRE #1/AUS #25 1971).
From the wiki: “‘Never Ending Song of Love’ was written by Delaney Bramlett and was first released in March 1971 on the Delaney & Bonnie album Motel Shot. The album’s title refers to the impromptu, sometimes late-night, jam sessions pursued by touring musicians when on the road. ‘Never Ending Song’ was Delaney & Bonnie’s most successful, highest-charting single. The New Seekers were formed in 1969 after the dissolution of The Seekers (‘Georgy Girl’) and quickly found chart success with a cover recording of Melanie’s ‘What Have They Done To My Song, Ma?’. Their breakthrough hit, released in June 1971, was ‘Never Ending Song of Love,’ reaching #2 on the UK Singles Chart and #1 in Ireland. That success led The New Seekers to being used as the session singers for the Coca-Cola jingle, ‘I’d Like to Buy the World a Coke’, which led in turn to the group being used to record the song reworked as ‘I’d Like to Teach the World to Sing‘.”
The New Seekers, “Never Ending Song of Love” (1971):