I am a young man who invested my money in stocks and lost a third of it, so I vowed to Allah not to return to them, but I did return.

Question:
He says: Honorable Shaykh, may Allah grant you success. He says: I am a young man who invested my money in stocks three years ago and lost a third of my capital, so I left them, making a vow to Allah not to return to them because of the riba (usury or interest) involved. During these years, I found no way to make up for my financial loss, so I returned to them recently. I am aiming to recover my principal. Is my return to them based on the saying of the Exalted in Surat al-Baqarah:

Answer:
Your return to them, when you previously made a vow to Allah not to return, constitutes an oath upon you, and you owe an expiation for the oath. You may return and take back the amount you paid or less than what you paid. However, taking more, while knowing that it is riba, gambling, and excessive uncertainty, is not permissible. Yes.