The most important duty of imam Mahdi(hgr) `s waiters is to get ready to have spiritual, moral, religious, belief and sentimental relations with believers(Mu’minīn); and on the other hand for combating themselves with unreasonable people .

Those who intensively participated in the holy defense [ the war between Iran and Iraq] armies during holy defense, were truth waiters.
The one who is ready to defend Islamic country, values , and the elate flag of Islam, when the country is threatened by enemy is a true waiter. S/he, can claim if imam Mahdi(pbuh) comes ,he/she will step (be present) behind imam Mahdi(pbuh) in risk places…

“Imam Khamenei”, Mosala Tehran, 2002/10/22.