To clarify: This is not a separate poem but a famous line from Tagore's well-known song (এখনো কোনো খেতে আসেন নি), which is part of Gitabitan (the collection of all Tagore songs).
It seems you're looking for a PDF of the Bengali poem or song by Rabindranath Tagore. rabindranath ekhane kokhono khete asen ni pdf