Musar su Levitico 26:37

The sixth section: One who has the ability to protest, but does not protest and has no words of reprimand in his mouth; and does not use the swords of his eyes and does not take responsibility for the deeds of sinners. So he will not be a man of reprimand, whereas we were commanded to destroy the evil from within our nation - as it is stated (Deuteronomy 13:6), “and you shall destroy the evil within you.” And our Rabbis said (Shabbat 54b), “Anyone who is in a position to protest against the members of his household and does not protest, is apprehended for the members of his household; if he is in a position to protest against the people of his city, and does not protest, he is apprehended for the people of his city; if he is in a position to protest the whole world, and does not protest, he is apprehended for the whole world.” And it is stated (Leviticus 26:37), “A man shall stumble over his brother.” And they, may their memory be blessed, expounded (Sanhedrin 27b), “‘A man over’ the iniquity of ‘his brother.’” And they said that all of Israel is responsible for one another.

And our Sages said, "Everyone for whom it is possible to protest against the sinful things of the people of his household, and he does not protest, is considered guilty of the wrongs of the men of his household. If it is possible for him to protest against the deeds of the people of his city and he does not do so he is held responsible for the wrongs of the people of the city. If it is possible for him to protest against the wrongs of the whole world and he does not do so, then he is considered guilty of the wrongs of all the world" (Shabbath 54b). And it is said, "And they shall stumble one upon another" (Lev. 26:37). And our Rabbis, of blessed memory, explained it as meaning, "Each man for the sin of his brother," which teaches us that all Israel are responsible, one for another (Sanh. 27b).