In plain words
They poured the pāyasa into three golden bowls and shared it equally among the three queens. Kaikā believed that, by the word Daśaratha had given at the time of their marriage, he would surely crown the son to be born to her. Kausalyā was the chief queen. So she felt that Daśaratha was bound to crown the son born to her. But Sumitrā had no such hope. She had taken her ceremonial bath, placed her bowl of pāyasa on the terrace and was drying her hair. Meanwhile an eagle came, snatched up the bowl and let it fall before Añjanādevī, who was meditating on a mountain. Añjanādevī ate that pāyasa, and Hanumān was born from her womb.
Kausalyā’s son was named ‘Śrī Rāma’ according to his horoscope and his star. Kaikeyī’s son was named ‘Bharata’. But two children were born to Sumitrā. What was the reason? When the eagle snatched away her bowl of pāyasa, she came down in distress and told Kausalyā and Kaikeyī about it. Then Kausalyā comforted her, poured half her pāyasa into a bowl and gave it to her. Kaikā too poured half her pāyasa into that bowl. That is why two children were born to Sumitrā. They were named Lakṣmaṇa and Śatrughna. But the two of them were crying all the time. They would not drink milk; they would not sleep even for a minute. Yantras, mantras and tantras were of no use at all. At last Sumitrā went to the sage Vasiṣṭha and told him her children’s condition. Then Vasiṣṭha closed his eyes and looked once with the eye of yoga: “Mother! The one born from the pāyasa Kausalyā gave you is Lakṣmaṇa; the one born from the pāyasa Kaikeyī gave you is Śatrughna. So Lakṣmaṇa is a part of Rāma, Śatrughna a part of Bharata. Go to Kausalyā, take her permission and lay Lakṣmaṇa in the cradle where her son lies; and in the same way lay Śatrughna beside Kaikā’s son Bharata.” Such was his advice.