Yāska's Nirukta 7.11

7.11

atha etāny āditya bhaktīny
asau lokas,.tṛtīya savanam varṣā jagatī saptadaśa stomo vairūpam sāma,.ye ca deva ganāḥ samāmnātā uttame sthāne āditya ādayaḥ yāś ca striyah/
atha asya karma rasa ādānam raśmibhiś ca rasa ādhāranam,.yac ca kiṃcit pravalhitam āditya karma eva tat/[779]
candramasā vāyunā saṃvatsarena iti saṃstavah/[779]
eteṣv eva sthāna vyūheṣv ṛtu chandas stoma pṛṣṭhasya bhakti śesam anukalpayīta/[779]
śarat anustubḥ ekaviṃśati stomo vairājam sāma iti pṛthivī āyatanāni/[779]
hemantaḥ paṅktis trinava stomaḥ śākvaram sāma ity antarikṣa āyatanāni/[779-780].[ḍ p.781:.anagni liṅge api cet mantre eteṣām anyatamam syāt sa āgneya iti pratipattavyam.] Cf. KB 23.5.37.
śiśiro aticchandas1.trayastriṃśa stomas raivatam sāma iti dyu bhaktīni/[780]