Shiva Purana
जुहुयुस्ते विरंच्याद्याश्चतस्रो मूर्तयः स्मृताः ॥ दैशिकः प्रथमं तेषामैशान्यां पश्चिमे ऽथ वा ॥ २४ ॥
The four idols, headed by Viranchya, should offer oblations. The daisika is first in the northeast or west of them.
english translation
juhuyuste viraMcyAdyAzcatasro mUrtayaH smRtAH ॥ daizikaH prathamaM teSAmaizAnyAM pazcime 'tha vA ॥ 24 ॥
hk transliteration by Sanscript