Shiva Purana
उदगायनमप्यग्नावग्न्यभावेऽप्सु वा पुनः ॥ पितॄन्प्रीणाति यो भक्त्या पितरः प्रीणयंति तम् ॥ ५॥
Even singing the rising sun in the absence of fire or fire or in water He who pleases the ancestors with devotion is pleased by the ancestors.
english translation
udagAyanamapyagnAvagnyabhAve'psu vA punaH ॥ pitRRnprINAti yo bhaktyA pitaraH prINayaMti tam ॥ 5॥
hk transliteration by Sanscript