Shiva Purana
स्वयं प्रातर्विवर्दे्धेत ध्वजः सायं पतेदिति॥ यदि कार्यं च सम्पूर्णं जातं चैव भवेदिह ॥ ६८॥
If the rites became full and complete, the banner rose up itself in the morning and fell down during the night.
english translation
svayaM prAtarvivardedheta dhvajaH sAyaM patediti॥ yadi kAryaM ca sampUrNaM jAtaM caiva bhavediha ॥ 68॥
hk transliteration by Sanscript