Exceprts from Vyasar virundhu by Rajaji
http://www.mahabharataonline.com/rajaji/mahabharata_summary_38.php
Bhagavan Vyasa says that Bhima felt completely refreshed and became much stronger than before by the embrace of Hanuman.
Hanuman said: “O hero, go to your abode. Think of me whenever you are in need. I felt the same delight when I embraced you that I had in times of yore when I was fortunate enough to touch the divine body of Sri Rama. Ask any boon that you like.”
Bhima said: “Blessed are the Pandavas for I have had the good fortune to see you. Inspired with your strength we are sure to conquer our enemies.”
Hanuman gave this parting blessing to his brother:
“While you roar like a lion in the battlefield, my voice shall join yours and strike terror into the hearts of your enemies. I shall be present on the flag of the chariot of your brother Arjuna. You will be victorious.”
Sivasankar Babu