Ramayana
तं दृष्ट्वा वानरमुखमवज्ञाय स राक्षसः । प्रहासं मुमुचे तत्र सतोय इव तोयदः ॥ 7-16-14 ॥
Seeing him with the face of a monkey, that Rakshasa, holding him in contempt, burst forth there into laughter, like a water-laden cloud.
english translation