"वेदा ब्रह्मात्मविषयास्त्रिकाण्डविषया इमे।" ~ श्रीमद्भागवतम् (११।२१।३५)
The trikânda (Karm, Upasana, jJyAn) divided Vedas have the knowledge of ब्रह्म and आत्मा as their subject matter. 2/n
Brahmsutra of Ved Vyasa for ज्ञानकांड
Bhakti Sutras of Narada and Shandilya for Upasana Kand
Karma Mimansa Sutras of Jaimini and Bhardwaja for Karma Kand
Karmkanda of Veda leads to Aadhibhautik Shudhi
Upasanakanda leads to Aadhidaivik Shuddhi
jJyAnkAnda leads to Aadhyatmik Shuddhi 5/n