While Hiraṇyakaśipu looked all around to find the source of the sound, that wonderful form of the Lord, which could not be ascertained to be either a man or a lion, emerged from the pillar. In amazement, Hiraṇyakaśipu wondered, “What is this creature that is half man and half lion?”
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सत्यं विधातुं निजभृत्यभाषितं व्याप्तिं च भूतेष्वखिलेषु चात्मनः । अदृश्यतात्यद्भुतरूपमुद्वहन् स्तम्भे सभायां न मृगं न मानुषम्
satyaṃ vidhātuṃ nijabhṛtyabhāṣitaṃ vyāptiṃ ca bhūteṣvakhileṣu cātmanaḥ | adṛśyatātyadbhutarūpamudvahan stambhe sabhāyāṃ na mṛgaṃ na mānuṣam
SB 7.8.18