al-Baqarah 2:195 And spend of your substance in the cause of Allah, and make not your own hands contribute to (your) destruction; but do good; for Allah loveth those who do good.
"Proof of Cigarette being Haram"
all intoxicants are haram....let not your own hands be the cause of your death.....while yes anything that is abused could be an intoxicant.....but that is not the case when it comes to true intoxicants that even the smallest amounts can do harm to you, (and tobacco is not an intoxicant.... it is however harmful to your health (one of the leading causes of death) and as such it is haram, "let not your own hands contribute to your destruction") or in this case with smoking can do harm to those around you.... not to mention that I would think that it would break your wudu, anything that makes you unclean would break the wudu and the stench of cigarettes is very much unclean not only to you but to those around you...I have asthma and if anyone smokes around me or in a room shortly before I enter I can not breath.
Allah says, "And forbid them what is bad." - (Surah Al-'Araf, 7:157)
"O ye who believe! Intoxicants and gambling are an abomination of Satan's handiwork. Eschew such abominations that ye may prosper." - (Surah Al Ma'idah, 5:93)
"And slay not the life which Allah hath forbidden..." - (Surah, Al-Isra, 17:33)
"And make not your own hands contribute to your destruction." - (Surah, Al-Baqara, 2:195)
"Nor kill or destroy yourselves for verily Allah hath been to you most Merciful." (Surah, An-Nisa, 4:29)
Prophet Mohammed (peace & blessings of Allah be upon him) said: "Nor be hurt or injure others."
It is scientifically proven that the exhaled smoke of the smoker is hazardous to non-smokers around him.
Breathing of smoke caused by someone else is known as "passive smoking" or "secondhand smoking". It is also known as involuntary smoking. Approximately 50,000 non smoker deaths from heart related issues can be linked to passive smoking each year.
Allah says: "But squander not your wealth in the manner of a spendthrift, verily spendthrifts are brothers of evils." - (Surah, Al-Isra, 17:26, 27)
The amount of money a smoker spends on cigarette smoking in a period of 30 years is calculated to be Two Hundred Thousand Dollars or more. All this money is simply wasted (not including the money spent on smokers health care).
Suggestion: Quit this evil act, repent to Allah and do not stay around such friends;
The Qur'an informs us that on the Day of Judgment there will be people who will bite their hands in regret that they were lead astray because of choosing wrong people as their friends, they would say;
"Woe to me! Would that I had never taken so-and-so as a friend! He indeed led me astray from the Reminder (this Qur'an) after it had come to me.' (The Glorious Qur'an 25: 27)
Therefore; Smoking is absolutely Haram,
and Allah knows best.