How to buy forex for foreign travel

Before travelling to a foreign country, one can buy foreign currency from the dealers (including banks) authorised by the Reserve Bank of India (RBI). The amount of foreign currency that can be bought varies for different purposes as per RBI guidelines.

from Wealth-Economic Times https://economictimes.indiatimes.com/wealth/spend/how-to-buy-forex-for-foreign-travel/articleshow/78200674.cms