This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
Dear ———, I'll gie ye some advice
You'll tak it no uncivil:
You shouldna paint at angels mair,
But try and paint the devil.
To paint an angel's kittle wark,
Wi' auld Nick there's less danger;
You'll easy draw a weel-kent face,
But no sae weel a stranger.