He here goes back to the source of all sin, in original depravity! What hyssop shall purge this away, what washing of water will make this clean? Oh! how blessed is it do behold Christ, whose blood alone cleanseth from all sin. 1 John 1:7.
Related Commentaries of Psalms 51:5
Psalms 51:5-7
5 Behold, I was shapen in iniquity; and in sin did my mother conceivea me.
6 Behold, thou desirest truth in the inward parts: and in the hidden part thou shalt make me to know wisdom.
7 Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.