Source, in full
Will Ye Go and Marry Katie?, attributed to Burns in P. H. Dalbiac (ed.) Dictionary of Quotations: English (London: Swan Sonnenschein & Co., Ltd., 1896) p. 34. But cf. Wilt Thou Go and Marry, Katie? in Alexander Ross's Helenore, &c., 3rd ed. (Aberdeen, 1789) p. 138