Yuddha Kanda 47.4

Having arranged the army in place, Hanuman, Angada, Nila, Kumuda, Nala, Gava, Sarabha, Gandhamadana, Sanuprastha, Jambavan, Rshaba, Rambha, Satavali, Pruthu, who are always alert were holding trees and looking above, on either side and in all directions and guarded Rama. Whenever there was movement of even a blade of grass, they thought that it might be Rakshasa.