Musar על ברכות 9:6

There is yet another general tikkun distinctive for the trait of lashon hara, and that is Torah study, as stated in Arachin 15b: "R. Chamma b. R. Chanina said: 'What is the amendment for the speakers of lashon hara? If he is a Torah scholar, let him occupy himself with Torah, as it is written (Proverbs 15:4): 'The healer of the tongue is the tree of life,' and the tree of life is none other than Torah, as it is written (Ibid. 3:18): 'It [Torah] is a tree of life to those who hold fast to it.'" As to its being called "a tree of life" — "Death and life are in the hand of the tongue" (Ibid. 18:21). If so, one who speaks lashon hara acquires for himself eternal death, wherefore Scripture counseled one who wished to heal his tongue to eat from the tree of life, which is Torah, "and he shall eat [thereof] and live forever."

Come and see how great is the power of Torah, for they have said (Berachoth 5b): "All who occupy themselves with Torah .. all of their sins are forgiven, it being written (Mishlei 16:6): 'By lovingkindness and truth, [Torah,] sin is forgiven.'"

And they have said further (Ibid. 5a): "All who occupy themselves with the study of Torah remove afflictions from themselves, as it is written (Iyyov 5:7): 'And the sons of reshef will be dispelled by uf,' 'uf' alluding to Torah, as intimated in (Mishlei 23:5): 'If you glance away [hatauf] from it [Torah], it will be gone,' and 'reshef,' [alluding] to afflictions, as in (Devarim 22:29): 'Wasted by hunger, embattled by reshef'" ["reshef," in that it follows 'hunger,' also denoting afflictions]. And, in Tanna d'bei Eliyahu: "If you see afflictions coming against you, run to words of Torah, and, immediately, the afflictions will flee, as it is written (Isaiah 26:20): "Go my people; enter into your chambers [of Torah], etc.'"