Numbers 14:18 - Joseph Benson’s Commentary on the Old and New Testaments

By no means clearing the guilty These words may seem to be improperly mentioned, as being a powerful argument to move God to destroy this wicked people, and not to pardon them. But Moses uses these and the preceding words together, because he would not sever what God had put together; and to show that at the same time that he desired pardon for the penitent, he did not expect God to reverse his own laws, and clear them who, notwithstanding all they had heard and known, would not come unto God for mercy, put their trust in him, and obey his commands. It is true the word guilty is not in the original, but, as is observed in the note on Exodus 34:7, it is necessarily supplied to make the sense complete. And the interpretation of the words there given is perfectly consistent with the context, and with Moses's intention here, which was not to beg that the people might be so pardoned as not to be chastised; for Moses certainly judged it proper that they should be chastised, and that severely; but that they might not be quite destroyed, or extirpated, as the Lord had threatened, Numbers 14:12, and as Moses feared would be accomplished.