अष्टैतान्यव्रतघ्नानि आपो मूलं फलं पयः ।
हविर्ब्राह्मणकाम्या च गुरोर्वचनेमौषधम् ॥
aṣṭaitāny avrata-ghnāni āpo mūlaṁ phalaṁ payaḥ |
havir brāhmaṇa-kāmyā ca guror vacanemauṣadham ||
(Mahābhārata; Udyama-parva; cited in Hari-bhakti-vilāsa: 12.100)
“These eight are non-breakers of a rite (vrata): (1) water, (2) roots, (3) fruits, (4) milk, (5) ghee, (6) that which is a request of a brāhmaṇa [i.e., something one is requested by a brāhmaṇa to take], (7) that which is an instruction of the guru [i.e., something the guru has instructed one to take], and (8) medicine.”