In the morning, when Pṛṣadhra, who was quite able to subdue his enemy, saw that he had killed the cow although at night he thought he had killed the tiger, he was very unhappy.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मन्यमानो हतं व्याघ्रं पृषध्रः परवीरहा । अद्राक्षीत्स्वहतां बभ्रुं व्युष्टायां निशि दुःखितः
manyamāno hataṃ vyāghraṃ pṛṣadhraḥ paravīrahā | adrākṣītsvahatāṃ babhruṃ vyuṣṭāyāṃ niśi duḥkhitaḥ
SB 9.2.8