Agniveshyagrihyasutra 2.5.5.7

2.5.5.7

devāsurāḥ saṃyattā āsan sa indraḥ prajāpatimupāghāvat tasmā etāñjayān prāyacchat tānajuhot tato vai devā asurānajayan yadajayan tajjayānāṃ jayatvaṃ spardhamānenaite hotavyā jayatyeva tāṃ pṛtanām iti \

"The gods and the Asuras were in conflict; Indra ran up to Prajāpati; he bestowed these Jayas upon him; he offered them; thereupon the gods conquered the Asuras; in that they conquered, that is the conquering nature of the Jayas; these should be offered by one who is contending; he certainly conquers that army."