This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
With Pegasus upon a day,
Apollo weary flying,
Through frosty hills the journey lay,
On foot the way was plying.
Poor slip-shod giddy Pegasus
Was but a sorry walker;
To Vulcan then Apollo goes,
To get a frosty calker.
Obliging Vulcan fell to work,
Threw by his coat and bonnet,
And did Sol's business in a crack;
Sol paid him with a sonnet.
Ye Vulcan's sons of Wanlockhead,
Pity my sad disaster;
My Pegasus is poorly shod—
I'll pay you like my master.