Shiva Purana
हिरण्यगर्भो भगवानुषित्वा परिवत्सरम् ॥ तदंडमकरोद्द्वैधं दिवं भूमि च निर्ममे ॥ १३ ॥
After staying there for a year, lord Hiraṇyagarbha, dichotomised that egg and created heaven and earth.
english translation
hiraNyagarbho bhagavAnuSitvA parivatsaram ॥ tadaMDamakaroddvaidhaM divaM bhUmi ca nirmame ॥ 13 ॥
hk transliteration by Sanscript