By nature the doe was always afraid of being killed by others, and it was always looking about suspiciously. When it heard the lion’s tumultuous roar, it became very agitated. Looking here and there with disturbed eyes, the doe, although it had not fully satisfied itself by drinking water, suddenly leaped across the river.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तमुपश्रुत्य सा मृगवधूः प्रकृतिविक्लवा चकित- निरीक्षणा सुतरामपि हरिभयाभिनिवेशव्यग्रहृदया पारिप्लवदृष्टिरगततृषा भयात्सहसैवोच्चक्राम
tamupaśrutya sā mṛgavadhūḥ prakṛtiviklavā cakita- nirīkṣaṇā sutarāmapi haribhayābhiniveśavyagrahṛdayā pāriplavadṛṣṭiragatatṛṣā bhayātsahasaivoccakrāma
SB 5.8.4