Shiva Purana
यश्च विद्याभिमानेन निस्तेजयति सुद्विजम् ॥ उदासीनं सभामध्ये ब्रह्महा स प्रकीर्तितः ॥ २६ ॥
He who, being arrogant of his gift of learning, puts to shame any good brahmin keeping silence and indifferent in the assembly is also a brahmin-slayer.
english translation
yazca vidyAbhimAnena nistejayati sudvijam ॥ udAsInaM sabhAmadhye brahmahA sa prakIrtitaH ॥ 26 ॥
hk transliteration by Sanscript