Musannaf Ibn Abi Shaybah

Hazrat Ibn Umar (may Allah be pleased with them both) said that there is no harm if, after stoning the Jamarat but before shaving the head, one washes his head with khatmi (marshmallow plant) and clay.

Hazrat Ata says that when it becomes permissible for you to shave your head, then wash your head with whatever you wish (there is no harm).

Hazrat Abu Ja'far says that there is no harm if a person washes his head before having his hair shaved.

Hazrat Laith says that I asked Hazrat Ata, Hazrat Tawus, and Hazrat Mujahid whether I could wash my head before shaving it, when shaving becomes difficult. They replied, "Yes, and if you wish, you may also wash it with khatmi clay."

Hasan disliked that a person in the state of ihram should wash his head with fuller’s earth before shaving.

Hazrat Jabir disliked that when a mahram woman intends to cut her hair, she should wash her head with khatmi clay.

Hazrat Ibn Umar (may Allah be pleased with them both) used to wash his head with fuller’s earth before shaving. The narrator states that Hazrat Ata disliked this.