Skandapurana 1.2.25.13

1.2.25.13

12 atha tasya tejomayaliṃgasyordhvāntaparyantaparicchittaye haṃsarūpadhāāriṇā brahmaṇa ūrdhvalokagamanam, tatra liṃgoparitanabhāgaśodhanapravṛttasya brahmaṇo'tidūra'ticirāgataketakīpatreṇa saha samāgamaḥ ... .245

12. Next, Brahmā, assuming the form of a swan, travels to the upper world to ascertain the upper limit of that luminous liṅga; there Brahmā, having set out to search the upper region of the liṅga, meets with a ketakī leaf that had fallen from very far and after a very long time ... .245