Valmiki Ramayana Ayodhya Kanda Sarga 61 Shloka 25

तादृशः such, सिंहबलः powerful as lion, वृषभाक्षः his eyes resembling a bull's, सः नरर्षभः that one, a bull among men, जलजेन by fish, आत्मजो यथा its own offspring, पित्रैव by his father himself, स्वयम् by himself, हतः killed.

Such Rama, the best among men, powerful like a lion, with eyes fierce like that of a bull has been destroyed by his own father just as the big fish destroys its own offsprings.