Reference: al-Muntaqaa min Fataawa Shaykh Saalih al-Fowzaan – Volume 5, Page 11, Fatwa No.9
Question: My foot was cut off whilst in jihaad – and all Praise be to Allaah – and in its place I put a (false) manufactured foot, so is it obligatory upon me to wash it [during wudhoo] and pass my hand over it if I am wearing a sock?
Response: If the foot was cut off from the shin and [thereby] you don’t have an ankle or a foot, and in its place you wear a (false) manufactured foot, then you are not required to wash it as the [Sharee’ah requirement] of washing your foot is relieved of you and nor are you required to pass your hand over your (false) manufactured foot.
However, if there remains some part of your foot from the ankle or that which is below it then it is obligatory upon you to wash that which remains [of your foot]. And if you wore a covering such as a khuf (leather sock) or a sock then you are to wipe your hand over the extent to which it is covered.
