Dought & clear, - Rulings on Tawbah, - Repentance From Past Unlawful Income.

What should a person do with the profits he made from selling
cigarettes, when it has been mixed with other lawful money?
Praise be to Allah.
He who has done business in things that are prohibited in Islam, such
as musical instruments, prohibited cassettes, cigarettes etc. while
knowing the ruling on them then wishes to repent, needs to give away
in charity all the profits he made from them. This will be ameans of
purification and will not be counted as spending in the way of Allah,
for Allah is pure and does not accept but the pure.
Further, if this money gets mixed up with other earnings, as in the
case of a shop owner who sells many other items, then if he can
compute the amount of profits made from them, he should do it in the
hope of purifying the rest of his earnings.
In other words he who has some money earned through unlawful meansand
intends to repent, should:
If he was an unbeliever at the time of earning the money, he is not
obliged to atone for them or seek their purification. For the Prophet
(peace be upon him) did not demand from his followers that they purify
their wealth after coming into the fold of Islam. If he was Muslim at
the time of earning the money, well aware of its Islamic ban and
prohibition, then heshould separate it out at the time of repentance.
And Allah knows best.