"He Ain't Heavy, He's My Brother" was originally recorded by Kelly Gordon in 1969, and became a hit for the Hollies' version later that year for their 1969 album of the same name.
The song was written by songwriters Bobby Scott and Bob Russell.
https://en.wikipedia.org/wiki/He_Ain't_Heavy,_He's_My_Brother
https://en.wikipedia.org/wiki/Hollies_Sing_Hollies#He_Ain't_Heavy,_He's_My_Brother_(US_version)
https://en.wikipedia.org/wiki/The_Hollies
The song was written by songwriters Bobby Scott and Bob Russell.
https://en.wikipedia.org/wiki/He_Ain't_Heavy,_He's_My_Brother
https://en.wikipedia.org/wiki/Hollies_Sing_Hollies#He_Ain't_Heavy,_He's_My_Brother_(US_version)
https://en.wikipedia.org/wiki/The_Hollies