देवकिन्नरगंधर्वाः ।पितृयक्षास्तुतुंबरुः ॥मुनयोऽपिनजानंति ।गुरुशुश्रूषणेविधिं ॥
In plain words
The gods, the kinnaras and the gandharvas, the ancestors and the yakṣas, and Tumburu too, and even the munis do not know the rule for waiting upon the guru.