Service to parents result in increase in Rizq 
(earnings, livelihood) and in longer life.
A gaze of love and mercy cast at parents is the
equivalent of an accepted
Hajj 
.
Service to parents is superior to jihaad 
.
By rendering service to parents, one obtains the thawaab
of a Hajj 
, Umrah 
and Jihaad .
Jannah lies under the feet of your mother.
Gazing with anger at one's parents is disobedience to parents.
Disobedience to parents is among the Kabaa'ir 
(major) sins.
He who is disobedient to parents will be disgraced. (The curse of disgrace is repeated thrice in the Hadeeth).
Abusing parents is among the major sins, even the utterance of a harsh word or a word of disrespect.
Allah 
curses the one who displeases his parents.
The one who troubles his parents will be punished here
on earth (in addition to the punishment in the Aakhirah 
).
The one who disobeys his parents and displeases them,
will not enter Jannah. (He will first have to suffer his punishment
before being admitted into Jannah 
).
The doors of Jahannam 
are open for the one who disobeys his parents.
A murderer of parents will be among the worst-punished
in the Aakhirah .
The pleasure of the parents is the pleasure of Allah
and the displeasure of parents is the displeasure of Allah .
Service to parents is among the noblest acts by Allah .
Parents are either the Jannah or the Jahannam of their children. Cultivation of their pleasure leads to Jannah
while displeasing them paves the way to Jahannam .
A mother's du'aa for her children is accepted with swiftness.
Jibraa’eel
alayhis salaam 
cursed
offspring who displease their parents in their old age.
The best door to Jannah is one's father. Either guard it or destroy it.
Whoever desires increase in earnings and long life should be kind and obedient to parents. Kindness to parents secures forgiveness for sins.
The calamity of disobeying parents will be experienced before death as well as after death.
Neither the Fardh 
nor the Nafl 
ibaadah 
is accepted of a person who is disobedient to his parents.
Among the major sins, the worst is to commit shirk 
with Allah Ta’aala .
This is followed by the sin of disobedience to parents.