Āpastambagṛhyasūtra with Haradatta's Anākulāvṛtti and Sudarśana's Gṛhyatātparyadarśanavyākhyā (with commentary) · Chapter 28

iti śrīsudarśanācāryakṛte gṛhyatātparyadarśane navamaḥ khaṇḍaḥ //
tṛtīyaśca paṭalaḥ samāptaḥ //
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atha caturthaḥ paṭalaḥ
atha daśamaḥ khaṇḍaḥ /
6 upanayanaprakaraṇam -
1 upanayanasya kālaḥ /
upanayanaṃ vyākhyāsyāmaḥ // Ā
COMMENTARIES:
ĀpGs-Anā_10.1:
yena ācāryakusamupanīyate kumāraḥ tadupanayanaṃ nāma karma śrautaḥ puruṣasaṃskāraḥ /
'garbhāṣaṭameṣu brāhmaṇamupanayīta'iti vakṣyamāṇenaivopanayanādhikāre siddhe pratijñākaraṇaṃ prādhānyakhyāpanārtham /
yathā"agnyādheyaṃ vyākhyāsyāma"(āpa.śrau.5.1.1) ityādau /
kathaṃ punarupanayanasya prādhānyam?yasmādanupanītasya śrautasmārteṣu sarveṣu karmasvanadhikāraḥ /
upanayane tu garbhādhānadibhirasaṃskṛtasyānaṃdhikāraḥ /
yatra brahmacāridharmāḥ sāmayācārikeṣu tatraivopanayane 'pyucyamāne sarvacaraṇārthatā syāt /
iṣyate cāsmadīyānāmevāyaṃ kalpaḥ /
tasmādatropadeśaḥ