This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Wilt thou be my dearie?
When sorrow wrings thy gentle heart,
Wilt thou let me cheer thee?
By the treasure of my soul,
That's the love I bear thee!
I swear and vow that only thou
Shalt ever be my dearie—
Only thou, I swear and vow,
Shalt ever be my dearie.
Lassie, say thou lo'es me;
Or if thou wilt na be my ain,
Say na thou'lt refuse me:
If it winna, canna be,
Thou for thine may choose me,
Let me, lassie, quickly die,
Trusting that thou lo'es me—
Lassie, let me quickly die,
Trusting that thou lo'es me.