Suddhikasutta

sn7.7:4.1 Regardless of whether you’re an aristocrat,

sn7.7:4.2 a brahmin, peasant, menial, <j>or a corpse-worker or scavenger—

sn7.7:4.3 if you’re energetic and resolute,

sn7.7:4.4 always staunchly vigorous,

sn7.7:4.5 you’ll attain ultimate purity.

sn7.7:4.6 Know that for a fact, brahmin.”