Narayana Sūkta.11

nīlatōyada-madhyastha-dvidyullēkhēva bhāsvarā। nīvāraśūkavattanvī pītā bhāsvatyaṇūpamā॥

He shines like the line of lightning situated in the middle of a blue water bearing clouds; He shines like an incomparable yellow of the slender bamboo cane.