Valmiki Ramayana Bala Kanda Sarga 61 Shloka 6
Original Shlokaतस्य वै यजमानस्य पशुमिन्द्रो जहार ह। प्रणष्टे तु पशौ विप्रो राजानमिदमब्रवीत्।।1.61.6।।
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यजमानस्य the performer's, तस्य पशुम् his (sacrificial) animal, इन्द्र: Indra, जहार ह stolen away, पशौ when the animal, प्रणष्टे (सति) could not be seen, विप्र: the priest, राजानम् addressing the king, इदम् this word, अब्रवीत् spoke.
While he was performing the sacrifice Indra stole away the sacrificial animal. The animal could not be traced. Hence the priest said to the king: