My father deals with a riba (usury or interest) bank, claiming that he heard one of the scholars permit it. What is the ruling on our eating from his earnings?

Question:
May Allah reward you, Honorable Shaykh. This questioner says that his father deals with a riba bank, and when he told him that riba and banks are forbidden, he said that so-and-so among the scholars said there is no harm in it in a fatwa he issued. What is the ruling on our eating from his food?

Answer:
But Allah (Exalted and Majestic is He) says And do you say he issued a fatwa? This is a fatwa that contradicts the verse, contradicts the verse, and the Prophet (peace and blessings be upon him) said, "May Allah curse the one who eats riba." And do you say he issues fatwas? This contradicts the saying of the Messenger (peace and blessings be upon him). The Messenger curses the one who does this, and you say, "No, this is permissible." This is hostility toward Allah and His Messenger. Not every fatwa is to be followed, but those who follow their desires take what agrees with their desires. Those who follow their desires take what agrees with their desires. Not every fatwa becomes valid, and not every mufti is qualified to issue fatwas. There are ignorant people who issue fatwas, and there are scholars, but scholars of misguidance who issue fatwas other than the truth. Not every mufti is to be followed in his fatwa. Yes.