Arthashastra
" दिवा काकः कौशिकं हन्ति, रात्रौ कौशिकः काकम्" इति ॥
Others say that time is the best for the reason that during the day-time the crow kills the owl, and that at night the owl the crow.
english translation
" divA kAkaH kauzikaM hanti, rAtrau kauzikaH kAkam" iti ॥
hk transliteration by Sanscript