Brihat Samhita
क्षितिकम्पं आहुरेके बृहदन्तर्जलनिवासिसत्त्वकृतम् । भूभारखिन्नदिग्गजविश्रामसमुद्भवं चान्ये ॥ ३२-०१ ॥
Some say that earthquake (bhūkampa) is caused by huge water monsters and some that it is caused by the elephants supporting the Earth, resting for a time from their labour.
english translation
kSitikampaM Ahureke bRhadantarjalanivAsisattvakRtam । bhUbhArakhinnadiggajavizrAmasamudbhavaM cAnye ॥ 32-01 ॥
hk transliteration by Sanscript