Matsyapurana 93.151

93.151

navavāyasaraktāḍhyapātratrayasamanvitāḥ
samidho vāmahastena śyenāsthibalasaṃyutāḥ
hotavyā muktakeśaistu dhyāyadbhiraśivaṃ ripau //

With three vessels containing the blood of the young crows before them, bones of the hawks in their left hand and sacrificial fuel in the other, and their hair loose, the Brâhmaṇas should perform the sacrifice, all the while thinking ill of the enemies at the time of making these offerings.—151.