Leviticus 13:58
And the garment, either warp, or woof, or whatsoever thing of skin it be, which thou shalt wash, if the plague be departed from them, then it shall be washed the second time, and shall be clean.
Cross-reference
2 Kings 5:14
Parallel
2 Kings 5:14 records Naaman's actual washing and cleansing, directly echoing the washing of the garment — both show obedience brings physical cleansing.
Hebrews 9:10
Contrast
Hebrews 9:10 classifies such washings as temporary carnal ordinances, contrasting the external ritual with lasting spiritual cleansing.
2 Kings 5:10
Parallel
In 2 Kings 5:10, Naaman is told to wash for cleansing from leprosy, similar to the garment washing here — both involve washing for purification from plague.
Psalm 51:2
Allusion
Psalm 51:2 pleads for spiritual washing from sin, using the same cleansing imagery as the garment washing — a metaphor for inner purification.
2 Corinthians 7:1
Allusion
2 Corinthians 7:1 calls believers to cleanse themselves from all filthiness, applying the principle of washing to spiritual holiness.