sieve

A perforated plate or screen used for separating grain from chaff or various-sized grains from each other. Earlier models used woven hair, grass, or small reeds set in flat, round rims or held in a concave basin form to allow shaking motions that would agitate the contents and separate them. Biblical usage is mainly metaphorical for God’s discipline (Amos 9:9) or his judgment (Isa 30:28; Luke 22:31).