Shiva Purana
तिलेषु वा यथा तैलं दध्नि वा सर्पिरर्पितम् ॥ यथापः स्रोतसि व्याप्ता यथारण्यां हुताशनः ॥ ११ ॥
It is like oil mixed with sesame seeds or butter mixed with yogurt. Just as water permeates a stream or fire permeates a forest.
english translation
tileSu vA yathA tailaM dadhni vA sarpirarpitam ॥ yathApaH srotasi vyAptA yathAraNyAM hutAzanaH ॥ 11 ॥
hk transliteration by Sanscript