Manava Dharmashastra 2.87

2.87

japyenaiva tu saṃsidhyed brāhmaṇo nātra saṃśayaḥ
kuryād anyan na vā kuryān maitro brāhmaṇa ucyate //

But, undoubtedly, a Brahmana reaches the highest goal by muttering prayers only; (whether) he perform other (rites) or neglect them, he who befriends (all creatures) is declared (to be) a (true) Brahmana.