Bhagavatapurana 12.6.10

12.6.10

prāk-kūle barhiṣy āsīno gaṅgā-kūla udaṅ-mukhaḥ /
brahma-bhūto mahā-yogī niḥsaṅgaś chinna-saṃśayaḥ //

10. On the bank of the Ganga he sat down facing north on sacred grass of which the ends were turned towards the east, absorbed into Brahman, the great yogin rid of all attachment and free from all doubts.