viṣṇu-śaktiḥ parā proktā
kṣetrajñākhyā tathā parā
avidyā-karma-saṁjñānyā
tṛtīyā śaktir iṣyate
viṣṇu-śaktiḥ - the potency of Lord Viṣṇu; parā - spiritual; proktā - it is said; kṣetrajña-ākhyā - the potency known as kṣetra-jña; tathā - as well as; parā - spiritual; avidyā - ignorance; karma - fruitive activities; saṁjñā - known as; anyā - other; tṛtīyā - third; śaktiḥ - potency; iṣyate - known thus.
This is a quotation from the Viṣṇu Purāṇa (6.7.61).