Brassens adds music to this poem of Victor Hugo. An excellent "mise en musique" that made famous this poem.
On YouTube.
Lyrics (see below)
If you wonder why I suddenly select several songs by Brassens instead of the usual mix of various periods and artists it is because I have decided to change my approach: for the next weeks I am going to follow my bliss and right now it is looking for songs whose lyrics are pre-existing poems.