Valmiki Ramayana Sundara Kanda Sarga 48 Shloka 38

ततः then, राक्षसेन by the demon, अस्त्रेण by his weapon, बद्धः bound, सः वानरः that Hanuman, निर्विचेष्टः unable to move, अभवत् became, सः he, महीतले on the ground, पपात fell

Then Hanuman bound by the weapon of the demon was unable to move and fell on the ground.