What is the reason for prohibiting smoking?

Smoking is forbidden due to its numerous harms. Islam forbids everything harmful, as the Prophet (peace be upon him) said: "There should be neither harming nor reciprocating harm." It permits good things and forbids evil things, and smoke is among the evil things. Furthermore, it is a waste of money and extravagance, which Islam has prohibited. It is spent on something that causes harm, leading to disasters and fires. People are also bothered by the foul smell of smokers. The Prophet (peace be upon him) forbade eating garlic or onions before praying in the mosque so as not to bother the worshippers.