It has come in the traditions that the Prophet (S) has said. In my Ummat there are some people whose prayers are not accepted. Among them are those who pray for harm to their own parents. Then,, there are those who give loans and don't take a witness for these transaction. The third category is of such men who, when in disagreement with their spouses, reproach them continuously, instead of giving them divorce (Talaq) which is allowed to them by Allah.
The fourth type is of persons who don't make any serious effort to earn livelihood and sit at home praying to Allah to provide him sustenance. Allah says, "O my creature! I have provided to you the means for earning your livelihood. I have given you the limbs to work and earn a living. Even after sincere efforts if you are unable to earn, pray for My Help!" The fifth type is of the persons who have been gifted with lot of wealth that they squander. Then they pray to Allah to give them more. Allah's response will be that they were given plenty. Why didn't they use their wealth frugally instead of squandering it. Allah doesn't like extravagance (israaf). The sixth category of such persons is of those who talk ill of their kith and kin.
source : www.imamreza.net