Commentaries:
Jamieson, Fausset, and Brown
snow water—thought to be more cleansing than common water, owing to the whiteness of snow (Psalms 51:7; Isaiah 1:18).
never so clean—Better, to answer to the parallelism of the first clause which expresses the cleansing material, "lye:" the Arabs used alkali mixed with oil, as soap (Psalms 73:13; Jeremiah 2:22).
Other Jamieson, Fausset, and Brown entries containing Job 9:30:
Job 33:8
Job 34:8
Jeremiah 2:22
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