Shiva Purana
एकाहपूजाविहतौ कुर्याद्द्विगुणमर्चनम् ॥ द्विरात्रे च महापूजां संप्रोक्षणमतः परम् ॥ ६४ ॥
If the worship is in default for one day it shall be doubled, if in default for two days, great worship shall be performed. Samprokṣaṇa rite shall be performed thereafter.
english translation
ekAhapUjAvihatau kuryAddviguNamarcanam ॥ dvirAtre ca mahApUjAM saMprokSaNamataH param ॥ 64 ॥
hk transliteration by Sanscript