The Compendium of Suśruta 8.9

8.9

pariśiṣṭaṃ pūrvasaṃjñāvyākhyātumāha-atha khalvayana ityādi | yugapadekakālamayanadvayaṃ saṃvatsaraḥ, na pṛthag dakṣiṇāyanamuttarāyaṇaṃ vā | nanu, 'māghādayo dvādaśamāsā saṃvatsara.' ityukta, tataḥ (taḥ) kiṃ punarabhidhānena' ucyate, pūrvoditā (te) hi māghādayo dvādaśamāsā vyastā akramapaṭhitāśca saṃvatsara ityāśaṅkā syāt, 'athakhalvayane dve' ityādinirdeśe kriyamāṇe yena krameṇa ṣaḍṛtuvibhāge'yanadvayamuktaṃ tenaiva cedayanadvayaṃ yugapat syāttadā saṃvatsara iti
vyastānāmakampaṭhitānā ca māghādīnāṃ saṃvatsaratvaṃ nirastamiti | idānī yugapravibhāgaṃ darśayannāha-te tvityādi | te punaḥ pañca saṃvatsarā yugamiti saṃjñā prāpnuvanti | iyaṃ ca yugasya pāribhāṣikī saṃjñā, paramārthatastu kṛtādayaścatvāro yugaviśeṣāḥ | sa eṣa ityādi | sa eṣa kālaḥ |