What is the importance of honouring one's parents in Islam?

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
The importance of parents respact in the light of Qura'n & Sunna.  Jazakallah ho khairu kum.
(There may be some grammatical and spelling errors in the above statement. The forum does not change anything from questions, comments and statements received from our readers for circulation in confidentiality.)
Check below answers in case you are looking for other related questions:
My mother’s rights over me, my rights over her, and the extent of my independence
He had a disagreement with his parents before Ramadaan began; what do you advise him to do?

Answer:

Praise be to Allaah.

The importance of honouring ones parents is:

Firstly: it is obedience to Allaah and His Messenger (peace and blessings of Allaah be upon him). Allaah says (interpretation of the meaning):

And We have enjoined on man to be good and dutiful to his parents [al-Ankaboot 29:8]

And your Lord has decreed that you worship none but Him. And that you be dutiful to your parents. If one of them or both of them attain old age in your life, say not to them a word of disrespect, nor shout at them but address them in terms of honour. And lower unto them the wing of submission and humility through mercy, and say: My Lord! Bestow on them Your Mercy as they did bring me up when I was young [al-Israa 17:23]

In al-Saheehayn it is reported that Ibn Abbaas said: The Messenger of Allaah (peace and blessings of Allaah be upon him) was asked which deed is the best? He said, Faith in Allaah and His Messenger, then honouring ones parents And there are many other Aayat and Mutawaatir Ahaadeeth which say similar things.

Secondly: obeying and honouring ones parents is a means of entering Paradise, as it was reported in Saheeh Muslim from Abu Hurayrah that the Prophet (peace and blessings of Allaah be upon him) said: He is doomed, he is doomed, he is doomed. It was said, Who, O Messenger of Allaah? He said, The person whose parents, one or both of them, reach old age during his lifetime but he does not enter Paradise.

(Saheeh Muslim, 4627).

Thirdly: Respecting and honouring them brings friendship and love.

Fourthly: respecting and obeying them is a way of showing gratitude to them because they are the ones who brought you into this world. You should also show gratitude towards them for bringing you up and taking care of you when you were young. Allaah says (interpretation of the meaning):

And We have enjoined on man (to be dutiful and good) to his parents [Luqmaan 31:14]

Fifthly: if a person honours his parents this may be the cause of his own children honouring him. Allaah says (interpretation of the meaning):

Is there any reward for good other than good? [al-Rahmaan 55:60]

And Allaah knows best.

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

Related Answers:
He gets angry and does not speak to his parents and does not make up with them
His father wants him to help him in his business which involves some things that go against sharee’ah
She respects her mother-in-law more than she respects her mother!
My mother’s rights over me, my rights over her, and the extent of my independence
He had a disagreement with his parents before Ramadaan began; what do you advise him to do?

Recommended answers for you:
Is it obligatory to follow a particular madhhab?
Is it recommended to fast ten days of Dhu’l-Hijjah including the day of Eid?
What can benefit the deceased after his death? Can he hear what the living say?
The punishment for zina (fornication, adultery) and how to keep oneself from going back to it
The reason why it is forbidden to have intercourse with one's wife when she is menstruating or bleeding following childbirth