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.
I am my mammy's ae bairn,
Wi' unco folk I weary, sir;
And lying in a man's bed,
I'm fley'd wad mak' me eerie, sir.
I'm o'er young to marry yet;
I'm o'er young to marry yet;
I'm o'er young—'twad be a sin
To tak' me frae my mammy yet.
My mammy coft me a new gown,
The kirk maun ha'e the gracing o't;
Were I to lie wi' you, kind sir,
I'm fear'd ye'd spoil the lacing o't.
Hallowmas is come and gane,
The nights are lang in winter, sir;
An' you an' I, in ae bed,
In trouth I dare na venture, sir.
Fu' loud and shrill the frosty wind,
Blaws thro' the leafless timmer, sir,
But if ye come this gate again,
I'll aulder be gin simmer, sir.
I'm o'er young to marry yet;
I'm o'er young to marry yet;
I'm o'er young—'twad be a sin
To tak' me frae my mammy yet.