Is permissible to buy/sell with non-Muslim?
Yes buying/selling for a Muslim with non-Muslim is permissible as regards what is lawful.
I`m a married young man. I fell in love with a widow and proposed to her but her family refused because they feared that this would have an adverse impact on the future of her children. However, we entered into unregistered marriage and told my family and even my wife about it. I`m a person who fears Allah, The Almighty and want to clear myself from any liability before Him, The Exalted. What should I do?
All perfect praise be to Allah the Lord of The Worlds. May His blessings and peace be upon our Prophet Mohammad and upon all his family and companions.
It is imperative that you proclaim this marriage to preserve rights. Therefore, you must register it in an Islamic court. A second marriage isn`t forbidden, however, if the unregistered marriage had taken place without the consent of the woman`s guardian nor the presence of two honorable witnesses, then it is considered void and your relationship with this woman is forbidden. Therefore, you must conclude a new marriage contract with the approval of her guardian and the presence of two honorable witnesses. We advise you to fear Allah and adhere to the teachings of Sharia in this regard since sinful conduct is that which turns in your heart (making you feel uncomfortable) and you dislike that it would be disclosed to other people. And Allah The Almighy Knows Best.
What is the ruling on someone who perform their prayer after finishing it because they believe they missed a Rak'a, a prostration, or that they did not perform it correctly (thinking their prayer was invalid)?
If he was sure that his prayer is void then reperforming it is an obligation along with figuring out the reason of invalidity so long as this wasn't out of uncertainty. And Allah Knows Best.
Is the patient who is on dialysis twice a week obliged to observe fasting? Is his fasting on the days he is on dialysis considered valid or not?
Praise be to Allah the Lord of the Worlds.
Dialysis invalidates fasting because of the nutritional fluid used in that procedure, as pointed by specialized doctors, in addition to causing bodies to enter the stomach. Therefore, it is recommended that the patient who had undergone dialysis to observe fasting for the rest of that day, if he is able to, and make up for it after Ramadan. However, if the doctor told him that fasting, at any time, would damage his health, then he must break his fast and pay a ransom against every missed day. We pray that Allah blesses this person with recovery. And Allah The Almighty Knows Best.