Āpastambagṛhyasūtra with Haradatta's Anākulāvṛtti and Sudarśana's Gṛhyatātparyadarśanavyākhyā (with commentary) · Chapter 43

iti śrīsudarśanācāryakṛte gṛhyatātparyadarśane trayodaśaḥ khaṇḍaḥ //
pañcamaśca paṭalassamāptaḥ //
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atha ṣaṣṭhaḥ paṭalaḥ //
caturdaśaḥ khaṇḍaḥ /
mantrāmnānakrameṇa vivāhādayassaṃskārā vyākhyātāḥ /
anantaraṃ tatkrameṇaiva sīmantādayo vyākhyāyante-
10 sīmantonnayanam -
1 sīmantonnayanakālaḥ /
sīmantonnayanaṃ prathame garbhe caturthe māsi // Ā
COMMENTARIES:
ĀpGs-Anā_14.1:
sīmanto nāma keśamadhyer khāviśeṣaḥ /
sa unnīyate yasmin karmaṇi tat sāmantonnayanannāya karma garbhasaṃskāraḥ /
taccaturthe māsi kartavyam /
prathamaniyamādādhārasaṃskāro 'yam /
ādhāre ca saṃskṛte tatrāhitāḥ sarva eva garbhāḥ saṃskṛtā bhavanti