Shiva Purana
विनियोगाद्गुरोस्तस्य गां दोग्ध्रीं समकालयन् ॥ समानवत्सां कपिलां सर्वेऽन्यायागतास्तदा ॥ १३ ॥
At the instance of their preceptor they looked after his cow and her calf. All of them were unjust in their actions.
english translation
viniyogAdgurostasya gAM dogdhrIM samakAlayan ॥ samAnavatsAM kapilAM sarve'nyAyAgatAstadA ॥ 13 ॥
hk transliteration by Sanscript