Yoga Sūtra Chapter Four verse 10
तासामनादित्वं चाशिषो नित्यत्वात् ॥१०॥
tāsām-anāditvaṃ cā-āśiṣaḥ nityatvāt ||10||
And the beginninglessness of these is due to the eternality of primordial desire.
tāsām - of theseanāditva - beginninglessnessca - andāśis - will to live; desire for self-welfare; primordial desire; prayer, wish, asking for; blessing for, benedictionnityatvā - eternality