Bhagavatapurana 6.9.32

6.9.32

yat te gatīnāṃ tisṛṇāmīśituḥ paramaṃ padam /
nārvācīno visargasya dhātarveditumarhati //

32. O Lord, we bow to Thee whose highest nature no one of the later creation is fit to know, since Thou art the Ruler of the three courses of Satva, Rajas and Tamas, and Thou art the highest goal to be reached by working through them.