Brahmasphutasiddhanta · Chapter 19

dṛṣṭvā dina-%ardha-ghaṭikā yas arka-jñas akṣa-aṃśakān vijānāti/
udaya-antara-ghaṭikābhis jñātāt jñeyam sas tantra-jñas//

asta-antara-ghaṭikābhis yas jñātāt jñeyam ānayati tastmāt/
madhya-gatim yuga-bha-gaṇān ānayati tatas sas tantra-jñas//

ānayati yas tamas-ravi-śaśa-aṅka-mānāni dīpaka-śikha-auccyāt/
śaṅku-tala-antara-bhūmi-jñāne chāyām sas tantra-jñas//

iṣṭa-gṛha-auccya-jñas yas tad-antara-jñas nirīkṣyate tu jale/
gṛha-bhitti-agram darśayati darpaṇe vā sas tantra-jñas//

chāyā-%dvitīya-bhā-agra-antara-vijñānena vetti dīpa-aucyam/
śaṅku-chāyā-jñas vā bhūmes chāyām sas tantra-jñas//

dṛṣṭvā gṛha-tala-antara-jālabhos dṛṣṭvā agram gṛhasya bhūmi-jñas/
vetti gṛha-auccyam dṛṣṭvā taila-stham vā sas tantra-jñas//

vīkṣya gṛha-agram salile prasārya salilam punar sva-bhū-jñāne/
ānayati jalāt bhūmim gṛhasya vā auccyam sas tantra-jñas//

jñātais chāyā-puruṣais vijñāte toya-kuḍyayos vivare/
kuḍye arka-tejasas yas vetti ārūḍhim sas tantra-jñas//

iṣṭa-divasa-%ardha-ghaṭikā ghaṭikā-%pañcadaśa-antara-prāṇās/
tad-divasa-cara-prāṇās tais akṣam sādhayet prāk-vat//

jñāta-jñeya-grahayos udaya-antara-nāḍikābhis adhika-ūnas/
udayais jñātas jñātāt jñeyas prāk-aparayos jñeyas//

jñātas sa-bha-%ardhas udayais asta-antara-nāḍikābhis adhika-ūnas/
jñātāt pūrva-aparayos jñeyas bha-%ardha-ūnake jñeyas//

jñātam kṛtvā madhyam bhūyas anya-dine tad-antaram bhuktis/
trairāśikena bhuktyā kalpa-graha-maṇḍala-ānayanam//

sthiti-%ardhāt viparītam tamas-pramāṇam sphuṭam grahaṇe/
māna-udayāt ravi-indvos ghaṭikā-avayavena bha-udaya-tas//

dīpa-tala-śaṅku-talayos antaram iṣṭa-pramāṇa-śaṅku-guṇam/
dīpa-śikha-auccyāt śaṅkum viśodhya śeṣa-uddhṛtam chāyā//

śaṅku-antareṇa guṇitā chāyā chāyā-antareṇa bhaktā bhūs /
sa-chāyā śaṅku-guṇā dīpa-auccyam chāyayā bhaktā//

jñātvā śaṅku-chāyām anupātāt sādhayet samucchrāyān/
gṛha-caitya-taru-nagānām auccyam vijñāya vā chāyām//

yuta-dṛṣṭi-gṛha-auccya-hṛtā hi antara-bhūmis dṛk-auccya-saṅguṇitā//
phala-bhūs nyaste toye prati-rūpa-agram gṛhasya narāt//

gṛha-puruṣa-antara-salile vīkṣya gṛha-agram dṛk-auccya-saṅguṇitam/
gṛha-toya-antaram auccyam gṛhasya nṛ-jala-antareṇa hṛtam//

%prathama-%dvitīya-nṛ-jala-antara-antareṇa uddhṛtā jala-apasṛtis/
dṛṣṭi-auccya-guṇā ucchrāyas toyāt nṛ-jala-antara-guṇā bhūs//

chāyā-puruṣa-chinnam jala-kuḍya-antaram avāptam ārūḍhis/
adhyāyas %viṃśati-āryāṇām %ekonaviṃśas ayam//