Thanks Mrinal. This quote is in the জাভা যাত্রীর পত্র (Java Jatrir Potro) — Rabindranath Tagore’s travelogue to Java in the 1929. It is a beautiful travelogue where he explored the connection between ancient India and its influence on South East Asia. I shall see if I can post the Bengali version of the book from tagoreweb.in