Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 103.142

103.142

mṛṣṭānnaṃ brāhmaṇasyārthe svarge vāsaṃ tu yānti te /
brahmahatyāśvamedhābhyāṃ na paraṃ pāpapuṇyayoḥ //

[and who gives] sweet food for the sake of a brāhmaṇa, goes to dwell in heaven.
There is nothing higher than the killing of a brāhmaṇa and the horse sacrifice among sin and religious merit.