तत्रापरा ऋग्वेदो यजुर्वेदः सामवेदोऽथर्ववेदः शिक्षा कल्पो व्याकरणं निरुक्तं छन्दो ज्योतिषमिति । अथ परा यया तदक्षरमधिगम्यते ॥ ५॥

Of these two, the lower knowledge is the Rig-Veda, the Yagur-Veda, the Sama-Veda, the Atharva-Veda, siksha (phonetics), kalpa (rituals), vyakaranam (grammar), nirukta (etymology), chhandas (metre) and jyotis (astronomy); and the Higher Knowledge is that by which the Imperishable Brahman is attained.