Shiva Purana
गच्छंस्तिष्ठन्स्वपन्भुंजन्नान्यत्कर्म समाचरेत् ॥ समक्षं यदि कुर्वीत सर्वं चानुज्ञया गुरोः ॥ २४ ॥
He shall not do any thing without the permission of the preceptor, nor even walk, stand, sleep or eat. Especially if the work is performed in the presence of the preceptor it must necessarily be with his permission.
english translation
gacchaMstiSThansvapanbhuMjannAnyatkarma samAcaret ॥ samakSaM yadi kurvIta sarvaM cAnujJayA guroH ॥ 24 ॥
hk transliteration by Sanscript