Manusmriti
धर्मोपदेशं दर्पेण विप्राणामस्य कुर्वतः । तप्तमासेचयेत् तैलं वक्त्रे श्रोत्रे च पार्थिवः ॥ २७२ ॥
If he arrogantly teaches Brahmanas their duty, the king shall cause hot oil to be poured into his mouth and into his ears.
english translation
dharmopadezaM darpeNa viprANAmasya kurvataH । taptamAsecayet tailaM vaktre zrotre ca pArthivaH ॥ 272 ॥
hk transliteration by Sanscript