Do one act of service for your parents

جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ مَنْ أَحَقُّ بِحُسْنِ صَحَابَتِي قَالَ ‏"‏ أُمُّكَ ‏"‏‏.‏ قَالَ ثُمَّ مَنْ قَالَ ‏"‏ أُمُّكَ ‏"‏‏.‏ قَالَ ثُمَّ مَنْ قَالَ ‏"‏ أُمُّكَ ‏"‏‏.‏ قَالَ ثُمَّ مَنْ قَالَ ‏"‏ ثُمَّ أَبُوكَ ‏"‏‏.‏ وَقَالَ ابْنُ شُبْرُمَةَ وَيَحْيَى بْنُ أَيُّوبَ حَدَّثَنَا أَبُو زُرْعَةَ مِثْلَهُ‏.

“A man came to Allah's Messenger ﷺ and said, "O Allah's Messenger ﷺ! Who is more entitled to be treated with the best companionship by me?" The Prophet ﷺ said, "Your mother." The man said. "Who is next?" The Prophet said, "Your mother." The man further said, "Who is next?" The Prophet ﷺ said, "Your mother." The man asked for the fourth time, "Who is next?" The Prophet ﷺ said, "Your father”

قَالَ رَجُلٌ لِلنَّبِيِّ صلى الله عليه وسلم أُجَاهِدُ‏.‏ قَالَ ‏"‏ لَكَ أَبَوَانِ ‏"‏‏.‏ قَالَ نَعَمْ‏.‏ قَالَ ‏"‏ فَفِيهِمَا فَجَاهِدْ ‏"‏‏.

“A man said to the Prophet, "Shall I participate in Jihad?" The Prophet ﷺ said, "Are your parents living?" The man said, "Yes." the Prophet ﷺ said, "Do Jihad for their benefit”

قَالَتْ أَتَتْنِي أُمِّي رَاغِبَةً فِي عَهْدِ النَّبِيِّ صلى الله عليه وسلم فَسَأَلْتُ النَّبِيَّ صلى الله عليه وسلم آصِلُهَا قَالَ ‏"‏ نَعَمْ ‏"‏‏.‏ قَالَ ابْنُ عُيَيْنَةَ فَأَنْزَلَ اللَّهُ تَعَالَى فِيهَا ‏{‏لاَ يَنْهَاكُمُ اللَّهُ عَنِ الَّذِينَ لَمْ يُقَاتِلُوكُمْ فِي الدِّينِ‏}

“My mother came to me, hoping (for my favor) during the lifetime of the Prophet. I asked the Prophet, "May I treat her kindly?" He replied, "Yes." Ibn 'Uyaina said, "Then Allah revealed: 'Allah forbids you not with regards to those who fought not against you because of religion, and drove you not out from your homes, that you should show them kindness and deal justly with them”