Mahabharata 7.129.15

उलूकाश्चाप्यदृश्यन्त शंसन्तो विपुलं भयम्विशेषतः कौरवाणां ध्वजिन्यामतिदारुणम्

ulūkāścāpyadṛśyanta śaṃsanto vipulaṃ bhayamviśeṣataḥ kauravāṇāṃ dhvajinyāmatidāruṇam

Our plain-language meaning of this verse is waiting for scholar review.