Does intentional deception (*tadlis*) affecting the price of a female slave grant the buyer the option to void the sale?

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If deception is committed regarding attributes that cause price fluctuation, such as darkening a female slave's hair, curling it, reddening her face, or showing a mill with water retained to increase its perceived efficiency, the option to void the sale (*khiyar*) is established. This ruling is established because the deception relates to something that causes price variation, paralleling the pre-sale collection of milk in an udder (*tasriyah*). Imam Al-Shafi'i holds this view. The ruling applies to darkening the hair, which is agreed upon by Abu Hanifa.