Śatapatha Brāhmaṇa ("of a hundred paths") 3.1.1.3

3.1.1.3

na purastāddevayajanamātramatiricyeta | dviṣantaṃ hāsya tadbhrātṛvyamabhyatiricyate kāmaṃ ha dakṣiṇataḥ syādevamuttarata etaddha tveva samṛddhaṃ devayajanaṃ yasya devayajanamātram paścātpariśiṣyate kṣipre haivainamuttarā devayajyopanamatīti nu devayajanasya

Let not the measure of the sacrificial ground be exceeded on the east side, since such an excess would be in favour of his spiteful enemy. It may be so in the south, and also in the north; but that place of worship alone is thoroughly efficient where the measure of the sacrificial ground is exceeded in the west; for to him (who possesses such a one) the higher worship of the gods readily inclines. So much as to the place of worship.