Chapter 13 · The Field and the Knower · Krishna said
Bhagavad Gita 13.4 — Hear about the field
तत्क्षेत्रं यच्च यादृक्च यद्विकारि यतश्च यत्। स च यो यत्प्रभावश्च तत्समासेन मे शृणु ॥
tatkṣetraṃ yacca yādṛkca yadvikāri yataśca yat | sa ca yo yatprabhāvaśca tatsamāsena me śṛṇu ||
Meaning
Hear from me briefly what the field is, what it is like, what changes it goes through and where it comes from; and who the knower is and what his power is.