it is probable that each has its own name. But since all is uncertainty, I had rather leave the matter in suspense. Because the Prophet received his vision on the banks of the river, some argue from this, that the waters were, as it were dedicated to revelations, and when they assign the cause, they say that water is lighter than earth, and as a prophet must necessarily rise above the earth, so water is suitable for revelations. Some connect this with ablution, and think that baptism is prefigured.