Комментарий о цитате к Йешайау 5:14

“Every commandment which I command you, etc.” He started in singular form and ended in plural form: you shall observe to do so that you may live and multiply. This is because a righteous person is the foundation of the world, and even an individual who performs a single commandment — fortunate is he for he has tipped himself and the entire world to the side of merit, etc. Similarly, an individual who repents — forgiveness is granted to him and to the entire world. Therefore it says which I command you [in singular form to the individual], you shall observe to do so that you may live [in plural form], because the observance of an individual is as if many have observed the commandments, and the benefit reaches everyone. And it uses the word commandment in singular form to tell you that even the proper observance of a single commandment causes that you may live, according to the opinion of Rabbi Yehuda in Sanhedrin (111) who interpreted the verse and she opened her mouth without measure (Isaiah 5:14) to refer to one who did not observe even a single statute. But if one observed even just one statute, he is saved from Gehenna, because one commandment leads to another commandment, as explained in the portion of Shelach Lecha (15:38).

This controversy is found in the words of the Talmudic Sages (TB Sanhedrin 111a):
[Commenting on the verse in Isaiah 5:14] 'Therefore Sheol has enlarged her appetite and has opened her jaws for he who is without statute', Resh Lakish says: [The meaning of the phrase 'for he who is without statute' is] for he who has left even a single statute unperformed. [Disputing this interpretation] Rabbi Yochanan says: It does not befit their Master for you to say this to them, [for it would mean that He has condemned almost all of Israel to Sheol]. Instead, [take it to mean] for he who has not learned even a single statute; [had he done so he would have been saved from Sheol].
According to Resh Lakish, perfection requires the observance of all the precepts of the Torah without exception. However, according to Rabbi Yochanan, the observance of even one precept is enough, for a person's perfection depends on his doing as much as he can during his life.

Besides, whereas Eliphaz had at first attributed to Job the minor sin of not worshipping God out of love, he now regards him to be a totally wicked person, seeing how he had opened his mouth (Isaiah 5:14) to deny all the corner-stones of faith. It was evident from his words that he had not spoken out of his suffering for a person should not be held responsible for his anguish (Baba Batra 16b). However, from the way his statements were formulated and the fact that he put forward his thesis in such learned language, it was clear that he had been contemplating and working out these things over a long time, a time when he had still been at ease (Ch.15:2,7).

They open their mouth at me Heb. פערו, they open, like (Isa. 5:14), “and opened (ופערה) its mouth.”