Now as to the number, Jonah mentions here twelve times ten thousand men, and that is as we have said, one hundred and twenty thousand. God shows here how paternally he cares for mankind. Every one of us is cherished by him with singular care: but yet he records here a large number, that it might be more manifest that he so much regards mankind that he will not inconsiderately fulminate against any one nation. And what he adds, that they could not distinguish between the right hand and the left, is to be referred, I have no doubt, to their age; and this opinion has been almost universally received. Some one, however has expressed a fear lest the city should be made too large by allowing such a number of men: he has, therefore, promiscuously included the old, as well as those of middle age and infants. He says that these could not distinguish between the right hand and the left, because they had not been taught in the school of God, nor understood the difference between right and wrong; for the unbelieving, as we know, went astray in their errors. But this view is too strained; and besides, there is no reason for this comment; for that city, we know, was not only like some great cities, many of which are at this day in Europe, but it surpassed most of the principal cities at this day. We know that in Paris there are more than four hundred thousand souls: the same is the case with other cities. I therefore reject this comment, as though Jonah was here speaking of all the Ninevites. But God, on the contrary, intended to show, that though there was the justest reason for destroying entirely the whole city, there were yet other reasons which justified the suspension of so dreadful a vengeance; for many infants were there who had not, by their own transgressions, deserved such a destruction.
God then shows here to Jonah that he had been carried away by his own merciless zeal. Though his zeal, as it has been said, arose from a good principle, yet Jonah was influenced by a feeling far too vehement. This God proved, by sparing so many infants hitherto innocent. And to infants he adds the brute animals. Oxen were certainly superior to shrubs. If Jonah justly grieved for one withering shrub, it was far more deplorable and cruel for so many innocent animals to perish. We hence see how apposite are all the parts of this similitude, to make Jonah to loathe his folly, and to be ashamed of it; for he had attempted to frustrate the secret purpose of God, and in a manner to overrule it by his own will, so that the Ninevites might not be spared, who yet labored by true repentance to anticipate the divine judgment.