On House-building (vāstu-vidyā) - Verse 97

If the ground be over-grown with Kuśa grass, Sara or wild reeds, the Dūrvā grass, or reeds, or if its flavour be found to be sweet, astringent, sour or pungent, the Brāhmaṇas, the Kṣatriyas, the Vaiśyas or the Śūdras will respectively prosper.