I’m looking for some commentary from Warren Buffett or someone close to him pertaining to banks

I read from Mary Buffett that Warren's valuation of banks is much different when compared to something like Wrigley's gum for example because of the massive amount of liabilities that banks have. I don't think that I saw a whole lot else though about banks other than him liking Bank of America because it's more of a conservative bank. I'm looking for some concrete figures that he uses when looking at banks.