Her wish he knew, and made reply To that mute question of her eye: “Yea, love; the chain on him bestow Whose wisdom truth and might we know, The firm ally, the faithful friend Through toil and peril to the end.”

In plain words: Rama understands Sita's silent question. He tells her to give the necklace to the one who is wise, truthful and strong, the loyal friend who stayed with them through every danger to the end.