Answered by Shaykh Amjad Rasheed
I had a wallet for several years. Only recently did I realize that it was from pig skin. I know for sure that I prayed with it on me. But I dont know how much, though I think it is around 15% of the time what do I do?
Walaikum assalam wa rahmatullah,
It is obligatory for you to makeup the prayers you are certain to have performed with that wallet on you. It is recommended to make up the prayers that you are in doubt as to whether you had that wallet on you or not.
– Amjad Rasheed.
[Translated by Faraz Rabbani]