Psalms 51:1-13
To the chief Musician, A Psalm of David, when Nathan the prophet came unto him, after he had gone in to Bathsheba.
Have mercy upon me, O God, according to thy lovingkindness:
according unto the multitude of thy tender mercies blot out my transgressions. Wash me throughly from mine iniquity,
and cleanse me from my sin. For I acknowledge my transgressions:
and my sin is ever before me. Against thee, thee only, have I sinned,
and done this evil in thy sight:
that thou mightest be justified when thou speakest, and be clear when thou judgest. Behold, I was shapen in iniquity;
and in sin did my mother conceive me.
Behold, thou desirest truth in the inward parts:
and in the hidden part thou shalt make me to know wisdom. Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow. Make me to hear joy and gladness;
that the bones which thou hast broken may rejoice. Hide thy face from my sins,
and blot out all mine iniquities.
Create in me a clean heart, O God;
and renew a right spirit within me.
Cast me not away from thy presence;
and take not thy holy spirit from me.
Restore unto me the joy of thy salvation;
and uphold me with thy free spirit.
Then will I teach transgressors thy ways;
and sinners shall be converted unto thee.

David was a man after God’s own heart, because he knew how to ask for forgiveness. David said: Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow.

What is hyssop? It is a plant, a cleaning plant. It looks a lot like lavender. Lavender cleans you out and calms your mind. Hyssop has the same effect. It is native of the Mediterranean and is considered a holy plant. It is used as a disinfectant and cleanser. The oil can be used to treat arthritis and respiratory issues. In Christianity, it is associated with a new and clean spiritual life.

So, David did not just mention hyssop sparingly.

Kath-arios is the Greek word for purge. It means to clean, purify from sin, or cast out whatever is not pure or desirable.

David said clean out all the unnecessary, things spiritually and physically. As a Christian God has to clean us up for us to be an example for Him.