وَاخْفِضْ لَهُمَا جَنَاحَ الذُّلِّ مِنَ الرَّحْمَةِ
And lower unto them the wing of submission and humility through mercy,
means, be humble towards them in your actions.
وَقُل رَّبِّ ارْحَمْهُمَا كَمَا رَبَّيَانِي صَغِيرًا
and say;"My Lord! Bestow on them Your Mercy as they did bring me up when I was young."
means, say this when they grow old and when they die.
Ibn Abbas said;"But then Allah revealed;
مَا كَانَ لِلنَّبِىِّ وَالَّذِينَ ءَامَنُواْ أَن يَسْتَغْفِرُواْ لِلْمُشْرِكِينَ
It is not (proper) for the Prophet and those who believe to ask Allah's forgiveness for the idolators. .." (9;13)
There are many Hadiths which speak about honoring one's parents, such as the Hadith narrated through a number of chains of narration from Anas and others, which states that the Prophet climbed up on the Minbar, and then said,
Amin, Amin, Amin.
It was said, "O Messenger of Allah, why did you say Amin."
He said;
أَتَانِي جِبْرِيلُ فَقَالَ يَا مُحَمَّدُ رَغِمَ أَنْفُ رَجُلٍ ذُكِرْتَ عِنْدَهُ فَلَمْمُيصَلِّ عَلَيْكَ قُلْ امِينَ فَقُلْتُ امِينَ ثُمَّ قَالَ رَغِمَ أَنْفُ رَجُلٍ دَخَلَ عَلَيْهِ شَهْرُ رَمَضَانَ ثُمَّ خَرَجَ فَلَمْ يُغْفَرْ لَهُ قُلْ امِينَ فَقُلْتُ امِينَ ثُمَّ قَالَ رَغِمَ أَنْفُ رَجُلٍ أَدْرَكَ وَالِدَيْهِ أَوْ أَحَدَهُمَا فَلَمْ يُدْخِلَهُ الْجَنَّةَ قُلْ امِينَ فَقُلْتُ امِين
Jibril came to me and said,
"O Muhammad, he is doomed who hears you mentioned and does not say Salla upon you." He said, "Say Amin," so I said Amin.
Then he said,
"He is doomed who sees the month of Ramadan come and go, and he has not been forgiven." He said, "Say Amin," so I said Amin.
Then he said,
"He is doomed who grows up and both his parents or one of them are still alive, and they do not cause him to enter Paradise." He said, "Say Amin," so I said Amin.
Another Hadith
Imam Ahmad reported from Abu Hurayrah that the Prophet said;
رَغِمَ أَنْفُ ثُمَّ رَغِمَ أَنْفُ ثُمَّ رَغِمَ أَنْفُ رَجُلٍ أَدْرَكَ أَحَدَ أَبَوَيْهِ أَوْ كِلَيْهِمَا عِنْدَ الْكِبَرِ وَلَمْ يَدْخُلِ الْجَنَّة
He is doomed, he is doomed, he is doomed, the man whose parents, one or both of them, reach old age while he is alive and he does not enter Paradise.
This version is Sahih although no one recorded it other than Muslim.
Another Hadith
Imam Ahmad recorded Mu`awiyah bin Jahimah As-Salami saying that Jahimah came to the Prophet and said;
"O Messenger of Allah, I want to go out to fight and I have come to seek your advice."
He said,
فَهَلْ لَكَ مِنْ أُم
Do you have a mother?
He said, "Yes."
The Prophet said,
فَالْزَمْهَا فَإِنَّ الْجَنَّةَ عِنْدَ رِجْلَيْهَا
Then stay with her, for Paradise is at her feet.
Similar incidents were also recorded by others. This was recorded by An-Nasa'i and Ibn Majah.
Another Hadith
Imam Ahmad recorded that Al-Miqdam bin Ma`dikarib said that the Prophet said;
إِنَّ اللهَ يُوصِيكُمْ بِأبَايِكُمْ
إِنَّ اللهَ يُوصِيكُمْ بِأُمَّهَاتِكُمْ
إِنَّ اللهَ يُوصِيكُمْ بِأُمَّهَاتِكُمْ
إِنَّ اللهَ يُوصِيكُمْ بِأُمَّهَاتِكُمْ
إِنَّ اللهَ يُوصِيكُمْ بِالاَْقْرَبِ فَالاَْقْرَب
Allah enjoins you concerning your fathers,
Allah enjoins you concerning your mothers,
Allah enjoins you concerning your mothers,
Allah enjoins you concerning your mothers,
Allah enjoins you concerning your close relatives then the next in closeness.
This was recorded by Ibn Majah from the Hadith of Abdullah bin Ayyash.
Another Hadith
Ahmad recorded that a man from Banu Yarbu said;
"I came to the Prophet while he was talking to the people, and I heard him saying,
يَدُ الْمُعْطِي الْعُلْيَا
أُمَّكَ وَأَبَاكَ
وَأُخْتَكَ وَأَخَاكَ
ثُمَّ أَدْنَاكَ أَدْنَاك
The hand of the one who gives is superior.
(Give to) your mother and your father,
your sister and your brother,
then the closest and next closest."