The name of the Buddha that eliminates the sin of slandering the Dharma:

Namo’s good name is Jixiang King Tathagata

The third great vow of Namo’s good name is Jixiang King Tathagata:

May I achieve Bodhi in the next life. If there are sentient beings. Obsessed by greed, anger and ignorance. Committing endless sins and other evil deeds. Slandering the Dharma and not practicing good deeds. You will fall into hell and suffer all kinds of pain. If you can call my name sincerely. Due to this power, all sins and karmic obstacles will be eliminated. There are no sentient beings who fall into the lower realms and always receive the supreme peace and happiness of humans and heaven. Even Bodhi.

Nanfahai Shenghui Game Supernatural Tathagata

I hope that when I achieve Bodhi in the next life, if there are sentient beings who create all kinds of bad karma, do not believe in the Three Jewels, follow false views, abandon the right principles, and love happiness Evil disciples, who slander Buddhist scriptures and speak unholy teachings, who respectfully accept and uphold the books of heretics, who teach themselves and confuse people, will fall into hell with no time to escape, and who will fall into the eight difficulties of life, who are far away from the right path, who are blind and have no wisdom. If such a person Hear my name and recite it with your heart. Due to this power, when you are about to die, your righteous thoughts will appear to liberate you from all difficulties, and you will always be reborn in China, receive wonderful happiness, and even achieve enlightenment.

Nawuying Zhengdeng Enlightenment Tathagata, the King of Sumeru Mountain, has the treasure lotus flower and is good at dwelling in it.

The Tathagata King of Sumeru Mountain is good at staying in the treasure lotus flower. His body is yellow, and his hands are in the seal of concentration to support Mount Sumeru. Those who prostrate and recite his name can eliminate sins such as violating the vows between master and disciple and slandering the master.

Namo's precious lotus flower is good at subduing the Tathagata.

The precious lotus flower is good at subduing the Tathagata. The body is orange, with the right hand as a protective seal and the left hand as a Dharma seal. Those who prostrate themselves and recite his name can eliminate the sins of slandering the Dharma.

Promise, make offerings, and take refuge in the world of precepts in the south. There is nothing wrong with the Tathagata who is waiting for the Enlightenment of Mount Sumeru

Those who hear the name of this Tathagata will not slander the saint even in their dreams.

There is also the Great Compassion Mantra!