Yeah, there's no source. It's just from a book pushed by a conspiracy peddler that probably hasn't stepped foot in public archives.

DO NOT FALL for the mythological Lincoln pushed by the Greenback fiat movement. Like Ellen Brown and Bill Still, they are liars. The banking schemes you see today were because of Lincoln. Hollywood made him into some kind of hero like Hamilton to cover-up the fact that both of them crapped on the constitution amd were tools for bankers.

Nothing Lincoln did was wonderful. He didn't free slaves, it was just cheaper and technology was becoming more efficent. All it did was lead to crowe laws and plus, in Lincoln's memuors he is a virulent racist.

Lincoln was no liberal. He was a Republican Whig. A whigger, basically. A white gangster, warmonger who sided with the frankfurt school of bankers. 95% of Lincolns quotes concerning his wonderful debt backed greenbacks are fake. The quote you sourced is also fake.

https://web.archive.org/web/20190417070655/https://americanmissive.com/2009/03/20/did-abraham-lincoln-say-that/