Śatapatha Brāhmaṇa ("of a hundred paths") 3.5.1.28

3.5.1.28

atha purastāt | udīcīṃ śamyāṃ nidadhāti sa parilikhati vittāyanī me 'sītīmāmevaitadāhāsyāṃ hi vividāna eti

Thereupon he lays down the pin in front from south to north, and draws the outline with, 'Thou art my wealth-resort.' Thereby he means this (earth), for it is thereon that he walks having acquired (wealth).