Shiva Purana
हिरण्यवर्णमभवत्तदंडमुदकेशयम् ॥ तत्र जज्ञे स्वयं ब्रह्मा स्वयंभूरिति विश्रुतः ॥ १२ ॥
The Egg floating in the water assumed golden colour. Brahma himself famous as the self-born was born there.
english translation
hiraNyavarNamabhavattadaMDamudakezayam ॥ tatra jajJe svayaM brahmA svayaMbhUriti vizrutaH ॥ 12 ॥
hk transliteration by Sanscript