तयो: समुच्चयो मास: पितृणां तदहर्निशम् । द्वौ तावृतु: षडयनं दक्षिणं चोत्तरं दिवि ॥ ११ ॥
tayoh samuccayo masah pitrnam tad ahar-nisam dvau tav rtuh sad ayanam daksinam cottaram divi
- tayoh
- of them
- samuccayah
- aggregate
- masah
- month
- pitrnam
- of the Pita planes
- tat
- that (month)
- ahah-nisam
- day and night
- dvau
- two
- tau
- months
- rtuh
- a season
- sat
- six
- ayanam
- the movement of the sun in six months
- daksinam
- southern
- ca
- also
- uttaram
- northern
- divi
- in the heavens.
The aggregate of two fortnights is one month, and that period is one complete day and night for the Pita planes. Two of such months comprise one season, and six months comprise one complete movement of the sun from south to north.