CC Madhya 9.42
sāṅkhya, pātañjala, smṛti, purāṇa, āgama
There are many kinds of philosophers. Some are logicians who follow Gautama or Kaṇāda. Some follow the Mīmāṁsā philosophy of Jaimini. Some follow the Māyāvāda philosophy of Śaṅkarācārya, and others follow Kapila’s Sāṅkhya philosophy or the mystic yoga system of Patañjali. Some follow the smṛti-śāstra composed of twenty religious scriptures, and others follow the Purāṇas and the tantra-śāstra. In this way there are many different types of philosophers.