'You have limited a great thing! i.e. the mercy of Allah.' (Bukhari) *The one who listens to the Du'aa should say: 'Ameen' after it.
*One should ask Allah for every major and minute thing, for the Prophet () said:
'Ask Allah for everything, even to repair your sandal, for if Allah does not make it easy, it will never be repaired.'(Ibn Sun’nee)26 *One should not supplicate Allah for unlawful or polytheistic things.
*One should not desire death.
*One should not ask Allah to punish him in the life of this world.
*One should not ask Allah for something impossible; such as living an everlasting life in this world.
*One should not make Du'aa for something which has become a thing of the past.
*One should not make Du'aa for something which will not take place in Shari'ah; such as asking Allah to not allow a Muslim to enter Jannah.
*One should not make Du'aafor a sinful thing; such as making Du'aa to Allah to be addicted to intoxicants.