Shiva Purana
अलब्धात्मनिरोधानां व्यलीयंतः परस्परम् ॥ भूमौ केचित्प्रविविशुः पर्वतानां गुहाः परे ॥ ५४ ॥
Unable to restrain themselves, they merged into each other. Some entered the ground while others entered the caves of the mountains.
english translation
alabdhAtmanirodhAnAM vyalIyaMtaH parasparam ॥ bhUmau kecitpravivizuH parvatAnAM guhAH pare ॥ 54 ॥
hk transliteration by Sanscript