Mussar zu Schemuel I 3:14

[Torah study is] greater than all the sacrifices, for thus have Chazal expounded (Rosh Hashanah 18a): “(I Samuel 3:14): ‘The iniquity of Eli’s house will not be purged with sacrifice or offering forever.’ Rava said: ‘It cannot be purged with sacrifice or offering, but it can be purged with words of Torah.’” And thus does Scripture state (Vayikra 7:37): “This is the Torah for burnt-offering, meal-offering, and sin-offering, etc.” And they have said (Menachoth 110a): “If one occupies himself with Torah, it is as if he sacrificed a burnt-offering, as if he sacrificed a meal-offering, as if he sacrificed a sin-offering, as if he sacrificed peace-offerings.” And this is the language of the holy Zohar, Parshath Shelach 159a: “

Now let us speak about one who has the sin of the profaning of [God’s] name in his hands, the iniquity of which is not atoned by afflictions. And behold we have mentioned above that he has a healing cure if he constantly sanctifies [God’s] name, may He be blessed. You can find another atonement in his constantly meditating upon the Torah and his efforts in [its study]. [This is] as our Rabbis, may their memory be blessed, said (Rosh Hashanah 18a), “‘It will not be purged with sacrifice nor offering forever’ (I Samuel 3:14): With sacrifice or offering it is not atoned, but it can be atoned through Torah study”; and even though the sin of Eli’s house was with the profanation of the commandment of sanctified foods - as it is stated (I Samuel 3:13), “in that he knew that his sons brought a curse upon themselves.” And see [that it is] because Torah [study] is a cure for every very painful wound. Therefore is it written (Proverbs 15:4), “A healing tongue is a tree of life.”