Shiva Purana
कृत्वा शोभोपशोभाढ्यमैशान्यां तस्य कल्पयेत् ॥ एकहस्तं तदर्धं वा पुनर्वेद्यः तु मंडलम् ॥ ९ ॥
Another diagram shall be made on the altar one hand in width or half of it, to the north-east of the previous one and decorated well.
english translation
kRtvA zobhopazobhADhyamaizAnyAM tasya kalpayet ॥ ekahastaM tadardhaM vA punarvedyaH tu maMDalam ॥ 9 ॥
hk transliteration by Sanscript