All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Selling intoxicants (liquor) is one of the major great sins. The seller is cursed by the Prophet who said: "Allaah has cursed intoxicants, its drinker, its server, its seller, its buyer, its presser, the one who demands it to be pressed, its carrier, the one to whom it is conveyed and the one who consumes its price." [Abu Daawood] A similar narration is reported by Imaams At-Tirmithi, Ibn Maajah and Ahmad.
Selling intoxicants is among the major great sins whether it is sold expensively or cheaply. Most probably, the sin may increase if one sells at a high price because whenever the forbidden earnings increase the sin also becomes intensified.
Therefore, your father has to fear Allaah, repent immediately and should give up selling intoxicants. You are not allowed to offer any kind of help in this trade, if you help him you will participate in the sin. Allaah, the Glorified and the Exalted, Says (which means): {And cooperate in righteousness and piety, but do not cooperate in sin and aggression. And fear Allaah; indeed, Allaah is severe in penalty.}[Quran 5:2]. Your hindrance from helping your father is not considered as being undutiful to him as the obedience of parents is restricted only in lawful matters. Obeying them in unlawful matters is forbidden. The Prophet said: "No obedience (to somebody) is allowed in disobeying Allaah, for obedience is required only in what is good." [Al-Bukhari and Muslim]
You and your father both should repent to Allaah, the Glorified and the Exalted; whoever repents to Allaah, He accepts his repentance and grants him forgiveness. Allaah Says (which means): {But indeed, I am the Perpetual Forgiver of whoever repents and believes and does righteousness and then continues in guidance.}[Quran 20:82].
As for your living and eating from your father's income, if his income is mixed (lawful and unlawful) or unlawful income prevails then you may eat it but it is undesirable. If the income of your father is solely unlawful then you are not allowed to eat it unless you are poor and unable to earn then you may take only what suffices your dire needs till you become able to earn for yourself.
As for the prayer at that place, we hope that it is valid if it is performed fulfilling all its conditions and compulsory actions.
As for purchasing a house through a bank read Fataawa: 82102, 81594 and 81702.
You may get the addresses of Islamic centers by consulting any Islamic center in
Finally, we encourage you to advise your father and other Muslim brothers who are involved in such business to give up this practice and remind them of the punishment of Allaah, His wrath, the Day of Judgment and the time of standing in front of Allaah, bare footed and naked in a Day equal to fifty thousand years. In this matter, you may seek the help of pious brothers, responsible persons of Islamic centers and Imaams and Khateebs of mosques, in addition to supplicating Allaah to guide them and, He will accept the supplications, Inshaa' Allaah.
We ask Allaah, the Glorified and the Exalted, to improve the conditions of all Muslims.
To know the rulings of living in a non-Muslim country read Fatwa: 86405; how to advice one's parents read Fatwa: 88876 and Fatwa: 88293 about the relations between Muslims and non-Muslims.
Allaah Knows best.