Midrash su Salmi 84:7

Chapter 1: Rabbi Yochanan opened: "Those who pass through the valley of weeping (alluding to Gehinnom) turn it into a water spring; moreover, the early rain covers it with blessings." (Psalms 84:7). This teaches that the evil person confesses like the leper (who has to cover his upper lip) confesses, and says "I am so-and-so, son of so-and-so. I committed such-and-such sin in such-and-such place on such-and-such day in front of so-and-so in such-and-such and such-and-such gathering. There are three gates (reading שערים as per mss.) in Gehinnom, one in the sea, one in the wilderness, and one in settled land. From where is the one in the sea? As it is said: "From the belly of Sheol (another name for Gehinnom) I cried out, And You heard my voice." (Jonah 2:3). From where is the one in the wilderness? As it is said: "They went down [with all that belonged to them] alive into Sheol..." (Numbers 16:33). From where is the one in settled land? As it is said: "Declares the LORD, who has a fire in Zion, Who has an oven in Jerusalem." (Isaiah 31:9). There are five types of fire in Gehinnom: Fire that eats and drinks, that drinks and doesn't eat, that eats and doesn't drink, that doesn't eat and doesn't drink, and there is fire that eats fire. There are burning coals the size of mountains in it, and there are burning coals the size of hills in it. There are burning coals the size of the Dead Sea in it, and there are burning coals the size of large stones in it. There are rivers of pitch and sulfur in it, dragging and boiling hot coals of broom-wood. The sentence of an evil person: Angels of destruction push him so that he falls on his face and others receive him from them and push him in front of the fire of Gehinnom, and it opens its mouth wide and swallows him, as it is said: "Assuredly, Sheol has opened wide its gullet And parted its jaws in a measureless gape; And down into it shall go, That splendor and tumult, That din and revelry." (ibid. 5:14), to the one who doesn't have a single positive action that tilts him to the side of merit, but one who has in his hand Torah and good deeds and great afflictions come upon him is saved from the judgement of Gehinnom, as it is said: "Though I walk through a valley of deepest darkness, I fear no harm... Your rod and Your staff—they comfort me." (Psalms 23:4). "Your rod," those are the afflictions, "and Your staff," that is the Torah.