Gita 13.1
अर्जुन उवाच। प्रकृतिं पुरुषं चैव क्षेत्रं क्षेत्रज्ञमेव च। एतद्वेदितुमिच्छामि ज्ञानं ज्ञेयं च केशव॥
arjuna uvāca prakṛtiṁ puruṣaṁ caiva kṣetraṁ kṣetra-jñam eva ca etad veditum icchāmi jñānaṁ jñeyaṁ ca keśava
"Arjuna said: I wish to know about nature and the person, the field and the knower of the field, knowledge and that which is to be known, O Keshava."