CC Madhya 10.144

bhaṭṭa kahe, — gurura ājñā haya balavān
guru-ājñā nā laṅghiye, śāstra — pramāṇa
Word for word: 
bhaṭṭa kahe — Sārvabhauma Bhaṭṭācārya said; gurura ājñā — the order of the spiritual master; haya — is; balavān — strong; guru-ājñā — the order of the spiritual master; nā — not; laṅghiye — we can disobey; śāstra — scriptural; pramāṇa — injunction.
Translation: 
Sārvabhauma Bhaṭṭācārya said, “The order of the spiritual master is very strong and cannot be disobeyed. That is the injunction of the śāstras, the revealed scriptures.