In plain words
Śatrughna, born of the pāyasam Kaikeyī gave, must become Bharata's attendant. That itself is great merit,’ so she held; and calling her two sons: “Lakṣmaṇa! You must stand by Rāma. Śatrughna must stand by Bharata,” she said, and blessed them. With their mother's blessings, Lakṣmaṇa following Rāma and Śatrughna following Bharata, they spent their lives. Lakṣmaṇa would not stay away from Rāma for a single moment. Just so, Śatrughna would not be apart from Bharata for a single moment.
When Rāma went to the forest, Bharata and Śatrughna were not in Ayodhyā; they were in the kingdom of Kekaya. Lakṣmaṇa set out at Rāma's side. One day, as Rāma and Lakṣmaṇa were wandering in the Daṇḍaka forest, they came under a certain tree, and all at once Lakṣmaṇa's mind changed. At once he turned to Rāma: “Brother! Why this hardship! What need is there for us to leave Ayodhyā and suffer troubles in this forest! Let us go back to Ayodhyā at once; come,” he said. Seeing the reason for his strange behaviour, Rāma gently took him by the shoulder and, leading him on: “Lakṣmaṇa! Don't be hasty, don't be hasty. Come with me,” he said. When they had gone some distance: “Now tell me, Lakṣmaṇa! Do you say we should go back to Ayodhyā?” he asked. Lakṣmaṇa saw his mistake and begged to be forgiven. Then Rāma: “Lakṣmaṇa! These are not your feelings. Because you came to a place where demons roam, their evil qualities entered you. I know that your heart is most pure,” and by the time he had said this, Lakṣmaṇa's mind was at peace.
Sītā, Rāma and Lakṣmaṇa had built a leaf hut on the bank at Pañcavaṭī and were spending their days happily, when one day Mārīca, at Rāvaṇa's command, took the form of a golden deer and, running to and fro before the hut, caught Sītā's eye. Sītā asked Rāma to seize that deer and bring it. Rāma had the duty of making Sītā happy.