Nirnayasindhu 2.p3.12

2.p3.12

tadrahitā viddhā || tatra śuddhāyāmaṃsadehādviddhā nidhīyate || tatra sāmānyato vedhamāha mādhavīye paiṭhīnasiḥ- " pakṣadvayepi tithayastithiṃ pūrvī tathottarām | tribhirmuhūrtervidhyanti sāmānyoyaṃ vidhiḥ smṛtaḥ" iti || hemādrimadanaratnādau dvimuhūrtopyuktaḥ-"udite daivataṃ
bhānau pitryaṃ cāstamite ravau | dvimūhūrtā trirahaśca sā tithirhavyakavyayoḥ ||” iti viṣṇudharmokteḥ || dvimuhūrttatvaṃ cānukalpaḥ-'dvimuhūrttāpi karttavyā yā tithirvṛddhigāminī' iti
dakṣeṇāpi śabdokteḥ || ayaṃ vedhaḥ prātareva
sāyaṃ tu trimuhūrto vedha evaṃ-“ yāṃ tithiṃ samanuprāpya yātyastaṃ padminīpatiḥ | sā tithirūstadine proktā trimuhūrteva yā bhavet || ” iti skāndokteḥ || dīpikāpi-' trimuhūrtagā tu
sakalā sāye' iti || yāni tu-' vratopavāsasnānādau ghaṭikaikāpi yā bhavet || udaye sā
tithirbrāhmā viparītā tu paitṛke || ' ityādīni skāndādivacanāni, tāni vaiśvānarādhikaraṇanyāyenāvayavastutyā trimuhūrtapraśaṃsāparāṇi
tithiviśeṣe vedhaviśeṣaḥ skānde- nāgau dvādaśanāḍībhirdikūpañcadaśabhistathā | bhūtoṣṭādaśanāḍībhirdūṣayatyuttarāṃ tithim || ' iti || ayaṃ copavāsātiriktaviṣaya iti vakṣyate
iti vedhaḥ
tatra sarvā tithiyardahaḥ karmakālavyāpinī saiva grāhyā | 'karmaṇo yasya yaḥ kālastatkālavyāpinī
tithiḥ | tayā karmāṇi kurvīta hrāsavṛddhī na kāraṇam ||' iti viṣṇudharmokteḥ || dinadvaye
tadvyāptāvekadeśavyāptau vā yugmavākyānrirṇayaḥ | tasya pūrvābādhenopapatteḥ | karmakālasya
pradhānāṃgatvācca | yugmavākyaṃ tu nigamaḥ| “yugmāgniyugabhūtānāṃ ṣaṇmunyorvasurandhrayoḥ | rudreṇa