Because 'six' means completeness, the words 'to divide into six' or 'give a sixth part,' came into use. In a spiritual sense, this means completeness. The prophets were to drink water by 'the sixth part of a hin,' as in Ezekiel 4:11, and to 'take for an offering the sixth part of an ephah of a homer of wheat,' as in Ezekiel 45:13.

(参照: Apocalypse Revealed 610)