In the events of the Ramayana, when Lord Rama decided to wage war against Ravana, Vibhishana, the younger brother of the King of Lanka, chose to side with righteousness. Vibhishana was a pious and truth-loving person. He repeatedly advised Ravana to return Sita Mata to Lord Rama and avoid the war, but Ravana did not heed his advice.
Vibhishana realized that Ravana's path was leading to unrighteousness and destruction, so he decided to leave Ravana's side. Vibhishana left Lanka and came to Lord Rama's camp, seeking friendship with him. Lord Rama, recognizing Vibhishana's devotion, integrity, and righteousness, accepted him into his fold.
Vibhishana informed Lord Rama about all the secrets and weaknesses of Lanka and Ravana's army, which greatly helped Lord Rama in the war. Vibhishana supported Lord Rama during the war and made significant contributions to the victory of his army.
After the slaying of Ravana, Lord Rama appointed Vibhishana as the king of Lanka and instructed him to follow the path of righteousness and justice. Vibhishana obeyed Lord Rama's orders and established justice and peace in Lanka.
The story of the friendship between Rama and Vibhishana teaches us that true friends are those who stand by truth, righteousness, and justice. Vibhishana's piety and Lord Rama's friendship showed that true friends can face any difficulty together and ultimately achieve victory.