Skandapurana 5.209.9

5.209.9

.. viśvāmitra uvāca .. ..
eṣā puṇyatamā medhyā nāgavallī narādhipa ..
ayathāvatkṛtā vaktre bahūndoṣānprayacchati ..
tasmādyatnena saṃbhakṣyā dattvā caiva svaśaktitaḥ .. 9 ..

Viśvāmitra said: / This betel vine is most meritorious and pure, O ruler of men; / [yet] consumed improperly in the mouth, it brings many faults. / Therefore, it should be consumed with care, and after giving according to one's capacity.