Surah Al-Isra, ayah 23

۞ وَقَضَىٰ رَبُّكَ أَلَّا تَعۡبُدُوٓاْ إِلَّآ إِيَّاهُ وَبِٱلۡوَٰلِدَيۡنِ إِحۡسَٰنًاۚ إِمَّا يَبۡلُغَنَّ عِندَكَ ٱلۡكِبَرَ أَحَدُهُمَآ أَوۡ كِلَاهُمَا فَلَا تَقُل لَّهُمَآ أُفّٖ وَلَا تَنۡهَرۡهُمَا وَقُل لَّهُمَا قَوۡلٗا كَرِيمٗا ٢٣

Waqadā rabbuka allā ta'budū illā iyyāhu wabil-wālidayni ihsānan immā yablughanna 'indakal-kibara ahaduhumā aw kilāhumā falā taqul lahumā uffin walā tanharhumā waqul lahumā qawlan karīmā

And your Lord has decreed that you worship not except Him, and to parents, good treatment. Whether one or both of them reach old age [while] with you, say not to them [so much as], "uff,"⁷³⁵ and do not repel them but speak to them a noble word.