Hearing these words of the Kuru hero, Hanuman smiled, and that son of the wind-god (Hanuman) spake unto that offspring of the wind-god (Bhimasena), saying, ‘I am a monkey, I will not allow thee the passage thou desirest. Better desist and go back. Do thou not meet with destruction.’ At this Bhimasena replied. ‘Destruction at anything else do I not ask thee about, O monkey. Do thou give me passage. Arise! Do not come by grief at my hands.’ Hanuman said, ‘I have no strength to rise; I am suffering from illness.
In plain words: Hanuman, also a son of the wind-god, smiles and refuses to let Bhima pass. Bhima demands that he get up and move, or be hurt. Hanuman says he is too sick to rise.