This text comes from The Poetical Works of Robert Burns, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
O Thou, who kindly dost provide
For every creature's want!
We bless thee, God of Nature wide,
For all thy goodness lent:
And, if it please thee, Heavenly Guide,
May never worse be sent;
But whether granted, or denied,
Lord, bless us with content!
Amen!