This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Stay, my charmer, can you leave me?
Cruel, cruel to deceive me!
Well you know how much you grieve me;
Cruel charmer, can you go?
Cruel charmer, can you go?
By my love so ill requited;
By the faith you fondly plighted;
By the pangs of lovers slighted;
Do not, do not leave me so!
Do not, do not leave me so!