If someone’s income is Haram, can one borrow money from his for business? There will not be any extra loans for borrowing from him.
If it is certain that someone’s income is Haram, then it is not permissible to borrow money from him for business or for any other purpose. This must be avoided.
ففی الدر نقلا عن الأشباہ: ’’الحرمۃ تنتقل مع العلم بھا إلا للوارث‘‘ (۶/۳۸۶)۔