Manusmriti
शुचिं देशं विविक्तं च गोमयेनोपलेपयेत् । दक्षिणाप्रवणं चैव प्रयत्नेनोपपादयेत् ॥ २०६ ॥
Let him smear a pure and secluded place with cowdung, and carefully make it sloping towards the south.
english translation
zuciM dezaM viviktaM ca gomayenopalepayet । dakSiNApravaNaM caiva prayatnenopapAdayet ॥ 206 ॥
hk transliteration by Sanscript