Shiva Purana
व्रतान्येतानि नियमात्कर्तव्यानि द्विजन्मभिः ॥ व्रतान्येतानि तु त्यक्त्वा जायन्ते तस्करा द्विजाः ॥ १६ ॥
The sacred rites shall always be performed regularly by the brahmins. By abandoning these Vratas, brahmins become robbers.
english translation
vratAnyetAni niyamAtkartavyAni dvijanmabhiH ॥ vratAnyetAni tu tyaktvA jAyante taskarA dvijAH ॥ 16 ॥
hk transliteration by Sanscript