Śatapatha Brāhmaṇa ("of a hundred paths") 14.1.1.2

14.1.1.2

teṣām kurukṣetram devayajanamāsa tasmādāhuḥ kurukṣetram devānāṃ devayajanamiti tasmādyatra kva ca kurukṣetrasya nigacati tadeva manyata idam devayajanamiti taddhi devānāṃ devayajanam

Their place of divine worship was Kurukshetra.. Therefore people say that Kurukshetra is the gods’ place of divine worship: hence wherever in Kurukshetra one settles there one thinks, 'This is a place for divine worship;' for it was the gods’ place of divine worship.