Śrīmad-Bhāgavatam · Text 11.24.1
Who is speaking and story frame
श्रीभगवानुवाच
अथ ते सम्प्रवक्ष्यामि साङ्ख्यं पूर्वैर्विनिश्चितम् ।
यद् विज्ञाय पुमान् सद्यो जह्याद् वैकल्पिकं भ्रमम् ॥ १ ॥
śrī-bhagavān uvāca
atha te sampravakṣyāmi
sāṅkhyaṁ pūrvair viniścitam
yad vijñāya pumān sadyo
jahyād vaikalpikaṁ bhramam
Lord Śrī Kṛṣṇa said: Now I shall describe to you the science of Sāṅkhya, which has been perfectly established by ancient authorities. By understanding this science a person can immediately give up the illusion of material duality.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.