Shiva Purana
आग्नेयादीनि चत्वारि शुक्लेनैव प्रपूरयेत्॥ पूर्वे षड्बिन्दुसहितं षट्कोणं कृष्णमालिखेत्॥ २४॥
The south-east square and others, four in number, shall be filled with white paint. With six Bindus a six-sided figure shall be drawn in black in the east.
english translation
AgneyAdIni catvAri zuklenaiva prapUrayet॥ pUrve SaDbindusahitaM SaTkoNaM kRSNamAlikhet॥ 24॥
hk transliteration by Sanscript