Later in the 1970s, "My Sweet Lord" was at the centre of a heavily publicised copyright infringement suit due to its similarity to the Ronnie Mack song "He's So Fine", a 1963 hit for the New York girl group the Chiffons. In 1976, Harrison was found to have subconsciously plagiarised the song, a verdict that had repercussions throughout the music industry. Rather than the Chiffons song, he said he used the out-of-copyright Christian hymn "Oh Happy Day" as his inspiration for the melody.