Mbh 3.149.3

Vaisampayana said, “Witnessing that dreadful and wonderful body of Hanuman, like unto the Vindhya mountain, the son of the wind-god became bewildered. Then with his down standing erect, the noble-minded Bhima, joining his hands, replied unto Hanuman saying (there), ‘O lord, by me have been beheld the vast dimensions of thy body. Do thou (now), O highly powerful one, decrease thyself by thy own power. Surely I cannot look at thee, like unto the sun risen, and of immeasurable (power), and irrepressible, and resembling the mountain Mainaka. O hero, to-day this wonder of my heart is very great, that thou remaining by his side, Rama should have encountered Ravana personally. Depending on the strength of thy arms, thou wert capable of instantly destroying Lanka, with its warriors, and horses, elephants and chariots. Surely, O son of the wind-god, there is nothing that is incapable of being achieved by thee; and in fight, Ravana together with his followers was no match for thee single-handed.”