Śatapatha Brāhmaṇa ("of a hundred paths") 2.1.2.17

2.1.2.17

ta ha devāḥ sametyocuḥ | citra vā abhūma ya iyataḥ sapatnānavadhiṣmeti tadvai citrāyai citrātvaṃ citraṃ ha bhavati hanti sapatnānhanti dviṣantaṃ bhrātṛvyaṃ ya evaṃ vidvāṃścitrāyāmādhatte tasmādetatkṣatriya eva nakṣatramupertsejjighāṃsatīva hyeṣa sapatnānvīva jigīṣate

Thereupon the gods assembled and said, 'Wonderfully (kitram) indeed it has fared with us who have slain so many enemies!' Hence the wonderful nature (kitrâtva) of the asterism Kitrâ; and verily wonderfully it fares with him, and he slays his rivals, his spiteful enemy, whosoever, knowing this, sets up his fires under Kitrâ. A Kshatriya, therefore, should especially desire to take advantage of this asterism; since such a one is anxious to strike, to vanquish his enemies.