Ramayana
ततः प्रागुत्तरां गत्वा सागराः प्रथितां दिशम् । रोषादभ्यखनन्सर्वे पृथिवीं सगरात्मजाः ॥ १-४०-२४
Subsequently, the sons of Sagara, having gone towards the auspicious northeastern region ( iishaana-digbhaaga, Shiva-sthaana ), began to dig earth with wrath. ॥ 1-40-24॥
english translation
tataH prAguttarAM gatvA sAgarAH prathitAM dizam । roSAdabhyakhanansarve pRthivIM sagarAtmajAH ॥ 1-40-24
hk transliteration by Sanscript