Garudapurana 1.19.6

1.19.6

nāgabhogaḥ kramāñjñeyo rātrau bāṇavivartanaiḥ /
śeṣor'kaḥ phaṇipaścandrastakṣako bhauma īritaḥ //

The snake-period is to be known in order; at night through five revolutions. / Śeṣa is the Sun, the king of serpents is the Moon, and Takṣaka is declared to be Mars;