Manava Dharmashastra 2.10

2.10

śrutis tu vedo vijñeyo dharmaśāstraṃ tu vai smṛtiḥ
te sarvārtheṣv amīmāṃsye tābhyāṃ dharmo hi nirbabhau //

But by Sruti (revelation) is meant the Veda, and by Smriti (tradition) the Institutes of the sacred law: those two must not be called into question in any matter, since from those two the sacred law shone forth.