Mahabharata 3.31.30

हेतुमात्रमिदं धातुः शरीरं क्षेत्रसंज्ञितम्येन कारयते कर्म शुभाशुभफलं विभुः

hetumātramidaṃ dhātuḥ śarīraṃ kṣetrasaṃjñitamyena kārayate karma śubhāśubhaphalaṃ vibhuḥ

Our plain-language meaning of this verse is waiting for scholar review.