Shiva Purana

siva.sh/siva-purana/saturda-samhita/9/35

यथा तमो न तिष्ठेत सन्निधावंशुमालिनः ।। तथैव तव यो भक्तः पापन्तस्य व्रजेत्क्षयम्।। ३५।।

sanskrit

Just as darkness does not stand in the presence of the sun, similarly the sin of your devotee does not stand but is wasted away.

english translation

yathA tamo na tiSTheta sannidhAvaMzumAlinaH || tathaiva tava yo bhaktaH pApantasya vrajetkSayam|| 35||

hk transliteration by Sanscript