This text comes from The Book of Scottish Song, edited by Alexander Whitelaw, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Bonnie wee thing, cannie wee thing,
Lovely wee thing, wert thou mine,
I wad wear thee in my bosom,
Lest my jewel I should tine.
Wistfully I look and languish
In that bonnic face o' thine;
And my heart it stounds wi' anguish,
Lest my wee thing be na mine.
Wit, and grace, and love, and beauty,
In ae constellation shine;
To adore thee is my duty,
Goddess o' this soul o' mine!
Bonnie wee thing, cannie wee thing,
Lovely wee thing, wert thou mine,
I wad wear thee in my bosom,
Lest my jewel I should tine.