nisedha karite nare, yate chota bhai
mauna dhari' rahe laksmana mane duhkha pai'
nisedha karite nare—unable to prohibit Lord Ramacandra; yate—because; chota bhai—younger brother; mauna dhari'-becoming silent; rahe—remains; laksmana—Laksmana; mane—in the mind; duhkha—unhappiness; pai'-getting.
As a younger brother He could not stop Lord Rama from His resolution, and so He remained silent, although unhappy in His mind.
Link to this page: https://prabhupadabooks.com/cc/adi/5/151