Shiva Purana
विभावार्थं च तौ देवौ न किंचिदवजग्मतुः ॥ वेदात्मना तदाव्यक्तः प्रणवो विकृतिं गतः ॥ ६ ॥
The two gods did not come to anything to express themselves. Then the unmanifest oṁkāra by the Self of the Vedas became distorted.
english translation
vibhAvArthaM ca tau devau na kiMcidavajagmatuH ॥ vedAtmanA tadAvyaktaH praNavo vikRtiM gataH ॥ 6 ॥
hk transliteration by Sanscript