During Shri Raam’s fourteen years of exile in the forest, his consort Sita Devi was kidnapped by the Raakshas king, Raavan. The only way to rescue her from the evil hands of the wicked Raavan was battle. Shri Raam’s army comprised monkeys and bears while Raavan had many powerful warriors and weapons.
Hanuman was one of the bravest warriors in Shri Raam’s army. During the battle, many were killed on both sides. One of Raavan’s sons, Meghnaad struck down Shri Raam’s brother, Lakshman, who was unconscious. The only way to revive him was to have a special medicine made from a particular herb which was on the Himalayan mountain, many miles away. This herb had to be given to him before sunrise. How was this possible?
For Hanuman, nothing was impossible, and he set out for the Himalayas, taking his immense form, and flying through the air. Raavan learnt of his intention and sent the dreaded raakshas, Kaalnemi, to stop him but Hanumaan killed Kaalnemi and reached the mountain. However, there he encountered a problem he had not anticipated. The mountain was covered with herbs, and he was unable to identify the right one. There was no time to lose, so he simply lifted the whole mountain and flew back to Lanka!
The medicine was made and given to Lakshman who revived in no time. Indeed, nothing is impossible for Hanumanji.