Manava Dharmashastra 3.144

3.144

kāmaṃ śrāddhe 'rcayen mitraṃ nābhirūpam api tv arim
dviṣatā hi havir bhuktaṃ bhavati pretya niṣphalam //

(If no learned Brahmana be at hand), he may rather honour a (virtuous) friend than an enemy, though the latter may be qualified (by learning and so forth); for sacrificial food, eaten by a foe, bears no reward after death.