Ramayana
बाष्पसञ्छन्नसलिला रुतविज्ञेयसारसाः । हिमार्द्रवालुकैस्तीरैस्सरितो भान्ति साम्प्रतम् ॥ ३-१६-२४
Now the rivers are not visible as the waters are covered with vapour. They are only inferred through the cackling of swans and the sands of the bank moistened with dewdrops. [3-16-24]
english translation