Shiva Purana
एतत्कालान्तरं ज्ञेयमहर्वै पारमेश्वरम् ॥ रात्रिश्च तावती ज्ञेया परमेशस्य कृत्स्नशः ॥ २७ ॥
This interval of time is to be understood as the day of the Supreme Lord. The night is also to be understood as the whole of the Supreme Lord.
english translation
etatkAlAntaraM jJeyamaharvai pAramezvaram ॥ rAtrizca tAvatI jJeyA paramezasya kRtsnazaH ॥ 27 ॥
hk transliteration by Sanscript