In plain words
Once I have fully carried out God's command, I will be food for anyone at all. I will take Rāma's message, give it to Sītā, bring back word of Sītā and hand it to Rāma, and then I will come back to you as your food,” he said. “You madman! When I am hungry now, I do not want you saying you will come as food some day. Be ready as my food right now,” she said. “That is impossible. God's command alone matters to me; do what you like; however you torment me, I will give up my life, but I will not let go of God's command,” he said. Surasā took on many kinds of forms and tried to swallow Hanumān. But Hanumān, who kept God's command as his goal, killed her without any fear or bewilderment. That is, he took the life of the quality called envy.
From there he entered Laṅkā. He looked. Seeing Laṅkā so very beautiful: “Ah! I have never seen Rāvaṇa. When his very mansions are so beautiful, how holy his people's feelings must be!” he thought. At once he remembered Rāma's command. If this fellow were truly holy, why would he do such unholy deeds? Wanting to find out the good and bad in him, he took on a very small form and went to enter Laṅkā. There stood Laṅkiṇī, full of Ahaṅkāra. She saw him. “You monkey! Are you cheating even me and sneaking in like a thief?” she shouted. Hanumān flared up. “Am I a thief? Am I entering this Laṅkā as a thief? Your king is a great thief. All of you are demons fit for that king, ‘Yathā rājā tathā prajā’; our Lord is the embodiment of Dharma. He keeps to the word of truth. We, the disciples of our Lord, are also embodiments of Dharma. There is no room for such wicked qualities to enter us,” he roared. Then the demoness grew angry: “Are you calling our great king a thief?” “If he is not a thief, how did he carry off Sītā, the wife of Śrī Rāmacandra? If he is not a thief, who else is?” he said. Fighting in this way, he wiped out first the vāsanās, second envy and third Ahaṅkāra. He went on proclaiming to the world that these are the chief marks of a devotee. Those who are truly devotees must not hanker after these vāsanās in the least. Show and envy must not be in it at all. No room at all must be given to Ahaṅkāra. So one who is a devotee must suppress the vāsanās, envy and Ahaṅkāra. After seeing Sītā, he came to recognise her Bhakti and prapatti well. He tried to learn the qualities a devotee should have. One who is ceaselessly in the thought of God lets his body waste away. For one who builds up his body, Bhakti does not grow. For the very one in whom Bhakti has grown, the body does not grow. These two are very different from each other. He saw Sītā. Her body had wasted away greatly.