Anandakanda 1.3.40

1.3.40

hunediti samādiśya sāmayācārikaṃ bhajet /
devatāparicaryāṃ ca śuśrūṣāṃ ca guroḥ kuru //

Having thus instructed him, he should follow the customary rule [and say]: / 'Perform service to the deity and attendance upon the guru;