Is it permissible to use choppers and cutting tools which are used for pork after washing them with water and soap? Would you please mention the evidence? May Allaah Reward you.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

It is permissible to use utensils, knives as well as other tools which are used for pork, provided that that they are purified first. Purification here means totally removing the impurity where one finds neither color, nor taste nor smell. As evidence, it is narrated that Abu Tha‘labah Al-Khushani said: "O Messenger of Allaah! We live in a land ruled by the people of the Book; Can we take our meals in their utensils?" The Messenger of Allaah, sallallaahu ‘alayhi wa sallam, replied: "If you can get utensils other than theirs, do not eat out from theirs; but if you cannot get other than theirs, wash their utensils and eat out of them." [Al-Bukhari and Muslim]

Commenting on the Hadeeth, An-Nawawi said: "The utensils in this Hadeeth refer to vessels in which the flesh of swine is cooked and wine is drunk. This is explicitly stated in another narration in which Abu Tha‘labah said, 'We live with the People of the Book and they use their utensils for cooking the flesh of swine and drinking wine.' [Abu Daawood] Then the Messenger of Allaah, sallallaahu ‘alayhi wa sallam, mentioned the same reply."