Praise be to Allah and peace and blessings be on His Prophet SAWS.
Smoking is one of the things which has caused a lot of problems and harm these days and it has spread like wild fire. Before we discuss this topic in detail, we should know that Allaah the Almighty has divided things in the world into two types, good or permissible (al-tayyibaat, al-halaal) and evil or prohibited (al-khabaa'ith, al-haraam), and there is no third type. Allah says (interpretation of the meaning) in surat al-A'raaf (7:157):
"And He makes good things halaal for them and bad things haraam."
Considering this fact, smoking can either be permissible and good or prohibited and evil.
Thus, we present some of its characteristics and let the person asking the question see himself in which type lies smoking.
"Do not kill yourself. Allah is Merciful unto you." (Surat al-Nisaa' 4:29)
In addition, His Prophet SAWS (peace be upon him) said:
"There is no harm or causing of harm (in Islaam)." (Arabic "laa darar wa laa diraar")
He SAWS (peace be upon him) also said:
"A person will not be able to move on the Day of Judgment until he is asked about ... his body as to what he engaged it in."
Smoking also goes against the saying of the Prophet SAWS:
"Your body has a right on you."
"Those who cause harm to believing men and women without any reason do a great sin." (Surat al-Ahzaab, 33:58)
"… and do not be extravagant wasters. Those who are extravagant are kinsmen of Satan." (Surat al-Israa' 17:26-27)
Extravagance (in Islam) means spending on something haraam.
Spending money on cigarettes is a waste of resources as well. The Prophet SAWS (peace be upon him) said:
"A person will not be able to move on the Day of Judgment until he is asked about ..... what he owned as to how he spent it."
Considering all that has been presented, it can be clearly seen that smoking is an evil among many others. It is not permissible to indulge in it, or buy and sell it, or even to offer it to others. It is incumbent on a person who is addicted to it that he must make all efforts and get whatever necessary treatment to stop it. If the unbelievers have understood the harm caused by smoking and made laws regarding it, the Muslims should be even more eager to stop it and treat those who are addicted to it.
We ask Allah the Almighty to cure everyone indulging in this evil and help him in giving it up. Allah is the Best Guide to the Right Path.