Mahabharata 12.174.9

उपतिष्ठति तिष्ठन्तं गच्छन्तमनुगच्छतिकरोति कुर्वतः कर्म छायेवानुविधीयते

upatiṣṭhati tiṣṭhantaṃ gacchantamanugacchatikaroti kurvataḥ karma chāyevānuvidhīyate

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