Sanskrit
एवम् एव दुर्निशायां कृष्णपक्षागमे चिरम्।
तैमिरम् भावयन् रूपम् भैरवं रूपम् एष्यति॥ ८७॥
Transliteration
evam eva durniśāyāṁ kṛṣṇapakṣāgame ciram |
taimiram bhāvayan rūpam bhairavaṁ rūpam eṣyati || 87 ||
Translation
Like this, one should ever contemplate on the terrible darkness of night during the dark fortnight of the moon, if he desires to attain the form of bhairava.

Muni's Play