https://www.hindustantimes.com/india/dalit-pushed-into-boiling-oil-dies/story-eOvB5IHFFZomnjYdcoML0H.html

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http://www.dalitstan.org/holocaust/method/tortures.html  -----Manu Smrti VIII.272

" If a Sudra arrogantly teaches Brahmins their duty, the king shall cause hot oil to be poured into his mouth and into his ears."

Confirmed by holy hindu scripture:

Sanskrit text, Unicode transliteration and English translation by Ganganath Jha:

धर्मोपदेशं दर्पेण विप्राणामस्य कुर्वतः ।
तप्तमासेचयेत् तैलं वक्त्रे श्रोत्रे च पार्थिवः ॥ २७२ ॥

dharmopadeśaṃ darpeṇa viprāṇāmasya kurvataḥ |
taptamāsecayet tailaṃ vaktre śrotre ca pārthivaḥ || 272 ||

If through arrogance, he teaches brāhmaṇas their duty, the king shall pour heated oil into his mouth and ears.—(272)

https://www.wisdomlib.org/hinduism/book/manusmriti-with-the-commentary-of-medhatithi/d/doc201205.html