Bhagavad Gita 13.1
Arjuna asked, "My Lord, who is God, what is Nature, what is Matter, and what is the Self? What is Wisdom, and what is worth knowing? I wish to have this explained."
अर्जुन उवाच
प्रकृतिं पुरुषं चैव क्षेत्रं क्षेत्रज्ञमेव च।
एतद्वेदितुमिच्छामि ज्ञानं ज्ञेयं च केशव॥arjuna uvāca
prakṛtiṃ puruṣaṃ caiva kṣetraṃ kṣetrajñameva ca|
etadveditumicchāmi jñānaṃ jñeyaṃ ca keśava||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).