Adam Clarke on Genesis 18:23

Wilt thou also destroy the righteous with the wicked? - A form of speech similar to that in Gen 18:17, an invariable principle of justice, that the righteous shall not be punished for the crimes of the impious. And this Abraham lays down as the foundation of his supplications. Who can pray with any hope of success who cannot assign a reason to God and his conscience for the petitions he offers? The great sacrifice offered by Christ is an infinite reason why a penitent sinner should expect to find the mercy for which he pleads.