nṛbhir dhūtáḥ sutó áśnaiḥ ávyo vā́raiḥ páripūtaḥ
man-INST.PL wash-PERF.M.SG press-PERF.M.SG stone-INST.PL wool-GEN.SG filter-INST.PL strain-PERF.M.SG
It (the Soma) has been washed by men, pressed with the help of stones, strained with wool-filters.' (Ṛgveda 8.2.2)