The opening lines are:
> "Droning a song of the 'Weary Blues,'
> With his ebony hands on the keys,
> He made that poor piano moan with the blues."
While it doesn't start with "Lias bless lord you know days abroad," it's clear you're referring to the distinct style and tone of Hughes' work, especially his portrayal of the blues.
Let me know if you'd like to discuss "The Weary Blues" further or other poems by Langston Hughes!