kṣetra-jña iti tad-vidaḥ

arjunah uvaca-Arjuna said; prakrtim-nature; purusam-the enjoyer; ca-also; eva-certainly; ksetram-body; ksetrajnam-knower of the body; eva-certainly; ca-also; etat-all this; veditum-to understand; icchami-I wish; jnanam-knowledge; jneyam-the object of knowledge; ca-also; kesava-O Krsna; sri bhagavan uvaca-the Personality of Godhead said; idam-this; sariram-body; kaunteya-O son of Kunti; ksetram-the field; iti-thus; abhidhiyate-is called; etat-this; yah-anyone; vetti-knows; tam-him; prahuh-is called; ksetrajnah-knower of the body; iti-thus; tat-vidah-one who knows.