To him by toil and sorrow tried The prudent Lakshmaṇ thus replied: “Come, though our labour yet be vain, And search through Janasthán again,— A realm where giant foes abound, And trees and creepers hide the ground.

In plain words: Lakshmana answers his tired, grieving brother: even if their search has failed so far, they should search the dangerous Janasthan forest again.