Shiva Purana
अवमंता गुरूणां यः पश्चाद्भोक्ता नराधमः ॥ देवदूषयिता चैव देवविक्रयिकश्च यः ॥ ११ ॥
He who despises his teachers and later enjoys them is the lowest of men He who defiles the gods and sells the gods.
english translation
avamaMtA gurUNAM yaH pazcAdbhoktA narAdhamaH ॥ devadUSayitA caiva devavikrayikazca yaH ॥ 11 ॥
hk transliteration by Sanscript