Luqman - 31:15
And if they contend with you that you should associate with Me something of which you have no knowledge, do not follow either of them. But you should treat them well in this world. Follow the way of those who turn to me. To Me is your return in the end, and I will inform you of all that you do.
Related:
The Night Journey/17:23
"Your Lord has commanded you to serve Him alone and to be kind to your parents. If one or both of them grow old with you, do not even say to them "Ouf"and do not rebuke them. Speak to them in a good manner"
The Night Journey/17:28
If you have to turn away from them in order to obtain a mercy from your Lord which you hope for, speak a soft word to them.
Luqman/31:14
We admonished man about his parents, and his mother carries him with great difficulty. His weaning takes place in two years. You should thank Me and your parents. To Me is the return.
Luqman/31:15
And if they contend with you that you should associate with Me something of which you have no knowledge, do not follow either of them. But you should treat them well in this world. Follow the way of those who turn to me. To Me is your return in the end, and I will inform you of all that you do.