Mahabharata — Ashvamedhika Parva, Shloka 31
Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
एवं कर्म कृतं चित्र विषयस्थं पृथक् पृथक् । यथा कर्म कृतं लोके तथैतानुपपद्यते
evaṁ karma kṛtaṁ citraṁ viṣaya-sthaṁ pṛthak pṛthak | yathā karma kṛtaṁ loke tathaitān upapadyate ||
因此，诸业行纷然各异，其果亦在各自相应的境域中分别成熟。正如乘舟不能行于陆，乘车不能行于水；同样，种种行为导向种种归趣。在此世间，人所造何业，便有何等后果临于其身。
वायुदेव उवाच
Educational Q&A
Actions are domain-specific in their effects: each deed yields a corresponding result, and mismatched means cannot produce the intended end—just as a boat is for water and a chariot for land.
Vayudeva delivers a didactic statement explaining karmic correspondence, using everyday analogies (boat/land, chariot/water) to stress that beings reach different outcomes according to the particular actions they have performed.