The yogī whose body is always filled with the lunar phases (nectar), even if he is bitten by Takṣaka (king of snakes), the poison does not spread.

Soma-kalā-pūrṇam — filled with the lunar phases.The yogī’s body is saturated with the lunar nectar flowing from Sahasrāra.The sixteen kalās of the moon represent the fullness of amṛta.

Takṣakeṇa daṣṭasya — bitten by Takṣaka.Takṣaka is the king of the nāga snakes in Hindu mythology, whose venom is the most lethal.This reference emphasizes the absolute immunity of the yogī.

Viṣaṃ na sarpati — the poison does not spread.Lunar nectar neutralizes any toxins.This siddhi can be interpreted literally (resistance to poisons) or metaphorically (immunity to the “toxins” of worldly life: negativity, diseases, harmful influences).