Manava Dharmashastra 2.20

2.20

eteṣu deśeṣu kurukṣetrādiṣu prasūtasyāgrajanmano brāhmaṇasya sakāśātsvaṃ svaṃ caritramācāraṃ śikṣerañjijñāseran | 'tasmindeśa' ityanenaitadvyākhyātam |

All men on the earth may learn their respective duties from the Brāhmaṇa born in these countries. (20)

Medhātithi’s commentary (manubhāṣya):
From the ‘agrajanma,’ i.e., the Brāhamṇa—‘born in these countries’—Kurukṣetra and the the rest—all men ‘may learn’—seek to know—‘their respective duties’—proper conduct. This has been already explained under Verse 18.—(20)