Śatapatha Brāhmaṇa ("of a hundred paths") 7.4.1.12

7.4.1.12

yadveva puṣkaraparṇa upadadhāti | pratiṣṭhā vai puṣkaraparṇamiyaṃ vai puṣkaraparṇamiyamu vai pratiṣṭhā yo vā asyāmapratiṣṭhito 'pi dūre sannapratiṣṭhita eva sa raśmibhirvā eṣo 'syām pratiṣṭhito 'syāmevainametatpratiṣṭhāyām pratiṣṭhāpayati

And, again, why he puts it on the lotus-leaf;--the lotus-leaf is a foundation, for the lotus-leaf is this earth, and this earth is the foundation: he who is not settled on this earth, is unsettled even as one who is far away. Now by means of his rays that (sun) is settled on this earth: he thus settles him (Agni) on this earth, as his foundation.