In plain words
But Lakṣmaṇa was very angry. He thought of going that very moment and killing Kaikā and Mantharā. But Rāma: “Lakṣmaṇa! Keeping our father’s word is most important to us. We must not go against our father’s word,” and so he calmed him. “You must leave for the forest this very minute,” Kaikā commanded. At once Sītā, Rāma and Lakṣmaṇa mounted the chariot and set out.
Before going to the forest, Lakṣmaṇa went to his mother Sumitrā and received her blessings. Sumitrā was a woman of great virtue. Her very name is ‘Su-mitrā’, that is, a good friend. She rejoiced greatly at her son’s decision. After that Lakṣmaṇa went to his wife Ūrmilā. She was a fine painter. At that time she was painting a picture of Śrī Rāma’s coronation. Seeing it, Lakṣmaṇa: “Where is the coronation now? Rāma is going to the forest,” and told her all that had happened. He let her know that he too was going with them to the forest, to serve Sītā and Rāma. Ūrmilā raised no objection. Rather, she rejoiced that her husband had been given the good fortune of serving Sītā and Rāma. “Regard Sītā and Rāma as your parents and look after them as carefully as the eyelid guards the eye. During these fourteen years in the forest, do not think of my name or my form at all. Keep Sītā and Rāma alone in view,” said Ūrmilā, and bowed at Lakṣmaṇa’s feet.
The story of Śravaṇa Kumāra
As Sītā, Rāma and Lakṣmaṇa, the three, mounted the chariot and set out for the forest, Daśaratha ran after the chariot, crying, “Rāma, let me see you for one minute and then send you off. Stop a little while, stop, stop!” But Kaikā gave the command that he must go at once. Taking her command upon his head, Rāma went on without stopping the chariot. From that day Daśaratha took no food at all; he did not drink even a drop of water.