...this classic song remembers Bobby Kennedy, along with Abraham, Martin, & John.

Abraham Martin and John - YouTube

RBG's LOST MUSIC OLDIE #128: "Abraham, Martin, & John" (Moms Mabley #35 - 1969).

"Abraham, Martin and John" is a 1968 song written by **** Holler and first recorded by Dion. It is a tribute to the memory of four assassinated Americans, all icons of social change, namely Abraham Lincoln, Martin Luther King, Jr., John F. Kennedy and Robert F. Kennedy. It was written in response to the assassinations of King and the younger Kennedy in April and June 1968.

Each of the first three verses features one of the men named in the song's title, for example:

Has anybody here, seen my old friend Abraham -
Can you tell me where he's gone?
He freed a lot of people, but it seems the good die young
But I just looked around and he's gone.
After a bridge, the fourth and final verse mentions Robert "Bobby" Kennedy, and ends with a description of him walking over a hill with the other three men.
Moms Mabley -  Abraham, Martin & John (45).JPG.jpg
Comedian Moms Mabley performed a version that hit the U.S. Top 40, reaching #35 in 1969 and earning her the distinction of being the oldest person to appear on a Hot 100 top 40 hit, a record that still stands.

You can listen to this classic song at: https://www.youtube.com/watch?v=NMVn8h0JpTw