I copied this poem/song below from a Burns site. If that's the one you are looking for, thank Håvard, for I wouldn't have recognised the line.
Wolfgang

By yon castle wa' at the close of the day,
I heard a man sing tho' his head was grey;
And as he was singing the tears down came,
There'll never be peace till Jamie comes hame. -
The Church is in ruins, the State is in jars,
Delusions, oppressions, and murderous wars:
We dare na weel say 't, but we ken wha 's to blame,
There'll never be peace till Jamie comes hame. -

My seven braw sons for Jamie drew sword,
And now I greet round their green beds in the yerd;
It brak the sweet heart of my faithfu' auld Dame,
There'll never be peace till Jamie comes hame. -
Now life is a burden that bows me down,
Sin I tint my bairns, and he tint his crown;
But till my last moments my words are the same,
There'll never be peace till Jamie comes hame. -