Shatapatha Brahmana 10.2.4.4

10.2.4.4

atha vā ekaśatavidhaḥ saptavidhamabhisampadyata ekaśatadhā vā asāvādityo vihitaḥ saptasu devalokeṣu pratiṣṭhitaḥ sapta vai devalokāścatasro diśastraya ime lokā ete vai sapta devalokāsteṣveṣa pratiṣṭhitastathaivaitadyajamāna ekaśatadhātmānaṃ vidhāya saptasu devalokeṣu pratitiṣṭhati

And, indeed, the one hundred and one-fold passes into (becomes equal to) the sevenfold one; for yonder sun, whilst composed a hundred and one-fold, is established in the seven worlds of the gods, for, indeed, there are seven worlds of the gods,--the four quarters and these three worlds: these are the seven worlds of the gods, and in them that (sun) is established. And in like manner does the Sacrificer now establish himself in the seven worlds of the gods by constructing for himself a body a hundred and one-fold.