Śrī Rāmacandra-avatāra — Vow, Exile, Laṅkā-vijaya, and Rāma-rājya
Concise Bhāgavata Account
आरोप्यारुरुहे यानं भ्रातृभ्यां हनुमद्युत: । विभीषणाय भगवान् दत्त्वा रक्षोगणेशताम् । लङ्कामायुश्च कल्पान्तं ययौ चीर्णव्रत: पुरीम् ॥ ३२ ॥
āropyāruruhe yānaṁ bhrātṛbhyāṁ hanumad-yutaḥ vibhīṣaṇāya bhagavān dattvā rakṣo-gaṇeśatām laṅkām āyuś ca kalpāntaṁ yayau cīrṇa-vrataḥ purīm
After giving Vibhīṣaṇa the power to rule the Rākṣasa population of Laṅkā for the duration of one kalpa, Lord Rāmacandra, the Supreme Personality of Godhead [Bhagavān], placed Sītādevī on an airplane decorated with flowers and then got on the plane Himself. The period for His living in the forest having ended, the Lord returned to Ayodhyā, accompanied by Hanumān, Sugrīva and His brother Lakṣmaṇa.
This verse states that Lord Rāma personally granted Vibhīṣaṇa rulership over the Rākṣasas and the kingdom of Laṅkā, with dominion lasting until the end of the age (kalpānta).
Within the Rama narrative, Vibhīṣaṇa surrendered to Rāma and served dharma against Rāvaṇa; the Lord rewarded that devotion and righteousness by installing him as the rightful ruler of Laṅkā.
Honor commitments (vrata), protect dharma, and recognize sincere loyalty—Rāma’s conduct shows that integrity and faithful service should be acknowledged and empowered.