In plain words
Once, for Śrī Rāma's birthday, Kausalyā arranged a great feast and invited everyone. She gave out gifts to all. After everyone had gone, Rāma was going to his room. Sītā set out after Rāma. As Hanumān too was going after Rāma, Kausalyā: ‘My son! Rāma must rest. You need not go,’ she said. ‘But Mother Sītā is going, isn't she! Why should I not go?’ asked Hanumān. Pointing to Sītā's vermilion mark, Kausalyā said, ‘That is her very qualification for going with Rāma.’ Hanumān flared up. He went straight to the bazaar and smeared all the vermilion he could find there over his body. ‘If Mother Sītā gains the right to be with Rāma by putting on a little vermilion, why should I, who have smeared it over my whole body, not have that right?’ he thought. Who today has such Bhakti and surrender? You hope that the time ahead may be good. But it is the time gone by that was truly good. Such a time will not come into our hands again. So do not fritter away the chance that has come to you; make good use of it.
Once, Hanumān's mother came to Kausalyā's house. Kausalyā: ‘Mother! Who are you?’ she asked. ‘Mother! Do you not know who I am? I am the mother of Hanumān, who crossed the vast ocean with ease,’ she answered. A little later, Agastya's mother came. ‘Mother! Who are you?’ she was asked, and she answered, ‘I am the mother of Agastya, who swallowed the great ocean in one gulp.’ Kausalyā, overjoyed, said, ‘Surely your sons could achieve such mighty deeds only by the grace of my son Rāma!’ Then Rāma came: ‘Mother! There is no greatness of yours or of mine in this. They could achieve such mighty deeds only because they kept Rāma's name in mind with pure hearts. Rāma's name alone is the root and foundation of everything,’ he said.