Shiva Purana
परस्परेण जायंते परस्परहितैषिणः ॥ तत्तत्कल्पान्तवृत्तान्तमधिकृत्य महर्षिभिः ॥ २० ॥
They are born of each other and seek the welfare of each other. The great sages described the history of the end of that particular kalpa.
english translation
paraspareNa jAyaMte parasparahitaiSiNaH ॥ tattatkalpAntavRttAntamadhikRtya maharSibhiH ॥ 20 ॥
hk transliteration by Sanscript