Shiva Purana
तस्य चास्यतेस्सोऽश्वस्समुद्रे पूर्वदक्षिणे ॥ गतः षष्टिसहस्रैस्तु तत्पुत्रैरन्वितो मुने ॥ ४९ ॥
O sage, the sacrificial horse was let loose, followed by his sixty thousand sons. It reached the shore of the ocean in the south-eastern region.
english translation
tasya cAsyatesso'zvassamudre pUrvadakSiNe ॥ gataH SaSTisahasraistu tatputrairanvito mune ॥ 49 ॥
hk transliteration by Sanscript