Bhagavatapurana 3.8.18

3.8.18

ka eṣa yo 'sāv aham abja-pṛṣṭha etat kuto vābjam ananyad apsu /
asti hy adhastād iha kiñcanaitad adhiṣṭhitaṃ yatra satā nu bhāvyam //

18. "Who am I seated on the lotus? whence is this lotus which grows alone on the waters? There is possibly something beneath it on which this stands supported, and which should necessarily be a positive existence."