Musar su Geremia 9:4

The ninth section: Children who do not lie in recounting things that they heard and telling over events, but switch the words according to the circumstances of their wishes, [yet it is] without hurting any person through it. However they find a little benefit with their lies, even though they do not make money from it. And our Rabbis said (Yevamot 63a) that this is also forbidden, as it is stated (Jeremiah 9:4), “they have trained their tongues to speak falsely.” However their punishment is not like those that lie about something that [did not happen], the nature of which we discussed in the fifth (it should say fourth) section. Behold these are the sections of the group of liers; and we have already mentioned their centrality to you for the ways of faithful people, and that they are fundamental for the soul.

There are other liars close to the first group in level [of lying] but not exactly like them. Namely, those who lie in their reports and statements. These peoples' profession is not to go around and make up stories and deeds that never were nor will be. But when they come to tell over something, they mix in whatever lies they happen to think of. They habituate in this until it becomes part of their nature. These are the liars whose word is impossible to believe. This is as what our sages, of blessed memory, said: "it is the penalty of a liar, that even when he tells the truth, he is not listened to" (Sanhedrin 89b). For this evil has ingrained itself in their nature such that their words are unable to leave their mouths free of falsehood. It is about this that the prophet grieved and said: "they have taught their tongue to speak lies, they weary themselves to commit iniquity" (Yirmiya 9:4).

The ninth category is he who tells a story that he has heard, but he changes some of the narrative as he likes. Now there is no loss to any man in this, but he receives a bit of pleasure out of his lying, even though he does not gain any money out of it. For example (Yebamoth 63a), Rav would say to his wife, "Make me lentils," and she would make him peas — and whenever he would say to her, "Make me peas!" she would make lentils. Hiya, his son, went and reversed the matter. Whenever his father wanted peas, he would tell his mother, "Make lentils!" and she would make peas, and this the son did out of honor for his father, in order that there should be prepared for him the food that he wanted. Even so, Rav restrained him and persuaded him not to do this any more, because, "They have taught their tongue to speak lies" (Jer. 9:4). But the guilt in such a falsehood is not like the guilt of those who lie for no reason at all as we have mentioned in the fourth category.