As the father pigeon wretchedly stared at his poor children trapped in the net and on the verge of death, pathetically struggling to free themselves, his mind went blank, and thus he himself fell into the hunter’s net.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तांस्तथैवावृतान् शिग्भिर्मृत्युग्रस्तान् विचेष्टतः । स्वयं च कृपणः शिक्षु पश्यन्नप्यबुधोऽपतत्
tāṃstathaivāvṛtān śigbhirmṛtyugrastān viceṣṭataḥ | svayaṃ ca kṛpaṇaḥ śikṣu paśyannapyabudho'patat
SB 11.7.71