Natyashastra
मुहूर्तेनानुकूलेन तिथ्या सुकरणेन च । एवं तु स्थापनं कृत्वा भित्तिकर्म प्रयोजयेत् ॥ ४३॥
The establishment (sthāpana) should be done at an auspicious time (muhurta), with a favorable tithi (lunar day), and after completing this, the work of constructing the walls (bhittikarma) should be undertaken.
english translation
muhUrtenAnukUlena tithyA sukaraNena ca । evaM tu sthApanaM kRtvA bhittikarma prayojayet ॥ 43॥
hk transliteration by Sanscript