dvijānām anupetānāṁ sva-karmādhyayanādiṣu
dvijānām anupetānāṁ sva-karmādhyayanādiṣu |
yathādhikāro nāstīha syāc copanayanād anu ||
tathātrādīkṣitānāṁ tu mantra-devārcanādiṣu |
nādhikāro’sty ataḥ kuryād ātmānaṁ śiva-saṁstutam ||
(Āgama-śāstra; cited in Hari-bhakti-vilāsa: 2.3–4)
“As the twice-born [i.e., those of the brāhmaṇa, kṣatriya, and vaiśya varṇas] who have not been invested with the sacred thread do not have eligibility (adhikāra) for their own rites [e.g., chanting the gāyatrī-mantra and conducting yajñas], study [of the Veda], and so forth, and can [have eligibility] in that regard [only] after the upanayana [-saṁskāra, i.e., only after investiture with the sacred thread, meaning, only after receiving the sāvitra-birth and thus actually becoming twice-born], so those without dīkṣā here [i.e., on the path of bhakti] do not have eligibility for [chanting] mantras, [performing] ritual worship of Deva [i.e., Śrī Bhagavān], and so forth. Therefore, one should make oneself truly praised by Śiva!”