Matsya Purana 240.18

240.18

evantu daivasampannastathā pauruṣasaṃyutaḥ.
deśakālopapannāntu yātrāṃ kuryānnarādhipaḥ .. 240.17 ..

A king should be blessed by the Devas, after worshipping them and he should consider the time place, and circumstances and he should feel himself sufficiently powerful An ambitious king should not lose the opportunity of vanquishing his foe who is under unlucky stars and has his country and times against him As a crocodile is subdued by an elephant on land, an elephant by a crocodile in water, a crow by an owl during the night an owl by a crow during the day, so should a king start against his foe taking a measure of the current circumstances—17-19