From:
Milindapañha Milinda’s Questions
Arūpadhammavavatthānavagga Analysis of Formless Dhammas Chapter
13. Samuddaekarasapañha Question on the One Taste of the Sea
Rājā āha—The king asked:
“bhante nāgasena, kena kāraṇena samuddo ekaraso loṇaraso”ti? “Venerable Nāgasena, why does the sea have just one taste, the taste of salt?”
“Cirasaṇṭhitattā kho, mahārāja, udakassa samuddo ekaraso loṇaraso”ti. “The sea has just one taste, the taste of salt, your majesty, because it has been around a long time.”
“Kallosi, bhante nāgasenā”ti. “You are clever, venerable Nāgasena.”
Samuddaekarasapañho terasamo. Question on the One Taste of the Sea thirteenth