First George Harrison with Beware of Darkness. From his 1970 album All things must pass.
Heavily influenced by the Radha Krishna Temple, of which Harrison had become a devotee.
Then Simon and Garfunkel's The Boxer. From the album Bridge over Troubled Water (1970). Although it was released as a standalone single one year previously.
I'm hard pressed to find a more iconic folk rock duo. No, scrap that. There isn't a more iconic folk rock duo.
Goede nacht.
MFBB.