What is the effect on the purity of water if the change caused by impurity is removed through agitation?

Chapter on what purification is achieved with regarding water

Al-Mughni

Book of Purification

Book 2 · Issue 2 · Bab 2

Open in Qurani

Primary text

If agitation causes the change in the water to disappear, the impurity is lifted because its effective cause has ceased to exist.