Verse 21

विकल्पकलिताकारं देशकालक्रियास्पदम् ।चितो रूपं महाबाहो क्षेत्रज्ञ इति कथ्यते

In plain words

That form of consciousness whose very shape is fashioned by vikalpa, and which is the seat of place, time, and action — O mighty-armed one — is called the kṣetrajña, the knower of the field.