Nirnayasindhu 2.4.15

2.4.15

vratarūpopavāsaparaḥ | kṛṣṇaikādaśīniṣedhavaditi || madanaratnepyevam || idameva ca yuktam
vardhamānastu-'ahorātraṃ na bhoktavyam' iti śātātapīyokteḥ | 'sūryācandramasorlokānakṣayānyāti mānavaḥ ' iti phalaśrutermuktyadarśane upavāsaḥ kāmyaḥ | na tvayaṃ niṣedha ityāha
tanna | tatra vratatvepi prāguktaviṣṇudharme niṣedhāvaśyaṃbhāvāt || tathā ca vyāsaḥ-“ravigrahaḥ
sūryavāre some somagrahastathā | cūḍāmaṇiriti khyātastatra dattamamanta kam || vāreṣvanyeṣu
yatpuṇyaṃ grahaṇe candrasūryayoḥ || tatpuṇyaṃ koṭiguṇitaṃ yoge cūḍāmaṇau smṛtam ||”
tatra snānanirṇayaḥ
atra cādyantayoḥ snānaṃ kuryāt | “grasyamāne bhavetsnānaṃ graste homo vidhīyate | mucyamāne bhaveddānaṃ mukte snānaṃ vidhīyate ||” iti hemādrau vacanāt | 'snānaṃ syāduparāgādau madhye
homaḥ surārcanam' iti brahmavaivartācca | “sarveṣāmeva varṇānāṃ sūtakaṃ rāhudarśane | sacailaṃ tu
bhavetsnānaṃ sūtakānnaṃ ca varjayet ||” iti vṛddhavasiṣṭhokteśca || sacailaṃ muktisnānaparamiti
madanaratne uktam || bhārgavārcanadīpikāyāṃ caturviṃśatimate-“muktau yastu na kurvīta snānaṃ
grahaṇasūtake | sa sūtakī bhavettāvadyāvatsyādaparo grahaḥ || ” idaṃ ca snānamamantrakaṃ kāryamiti smṛtiratnāvalyām | tatra tīrthaviśeṣo bhārate-“ gaṅgāsnānaṃ tu kurvīta grahaṇe candrasūryayoḥ | mahānadīṣu cānyāsu snānaṃ kuryādyathāvidhi ||”
snānamāhātmyam
mahānadīṣvapi māsaviśeṣe kāścicchreṣṭhāḥ- “prayāgaṃ devikā revā saṃnihatyā ca vāraṇam