This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Does haughty Gaul invasion threat?
Then let the loons beware, Sir,
There's wooden walls upon our seas,
And volunteers on shore, Sir.
The Nith shall run to Corsincon,
And Criffel sink to Solway,
Ere we permit a foreign foe
On British ground to rally!
Fal de ral, &c.
O let us not like snarling tykes
In wrangling be divided;
Till, slap, come in an unco loon
And wi' a rung decide it.
Be Britain still to Britain true,
Amang oursels united;
For never but by British hands
Maun British wrangs be righted!
Fal de ral, &c.
The kettle o' the kirk and state,
Perhaps a clout may fail in't;
But deil a foreign tinkler loon
Shall ever ca' a nail in't.
Our fathers' bluid the kettle bought,
And wha wad dare to spoil it;
By heaven, the sacrilegious dog
Shall fuel be to boil it.
Fal de ral, &c.
The wretch that wad a tyrant own,
And the wretch his true-born brother,
Who would set the mob aboon the throne,
May they be damned together!
Who will not sing, 'God save the King,'
Shall hang as high's the steeple;
But while we sing, 'God save the King,'
We'll ne'er forget the People.