Valmiki Ramayana Aranya Kanda Sarga 51 Shloka 39

सञ्छिन्नबाहोः whose arms were cut off, बाहवः arms, सद्यैव instantly from them, वल्मीकात् from an anthill, विषज्वालाः poisonous flames, वलीयुक्ताः emitting, पन्नगाः इव like serpants, सहसा all of a sudden, अभवन् came out.

As the left arms were cut off, there came out from them all the ten arms instantaneously like serpents emitting poisonous flames from anthills