Quran 29:8 — We have directed man to treat his parents with compassion. But do not obey if they force you to associate partners with Me _ something you have no knowledge of! Towards Me is your final retreat. Then, I will let you know everything you have been doing.
Quran 17:23 — Your Lord has decreed that you should not worship anyone other than Him, and that you treat your parents well. When either, or both of them, reach an old age do not grumble and do not be angry with them. Rather, always have kind words to say to them.
Quran 31:14 — We have made the (care of) parents incumbent upon man. His mother carried him through the fatigue (of pregnancy) followed by the hardship (of labor). And the weaning takes two (more) years. Thank Me and your parents. (Remember)! Towards Me is your return!
Quran 4:36 — Serve Allah, and associate no one with Him. Be kind and gracious to your parents; (also be kind) to the kinsfolk, the orphans, the needy, the neighbor who is a kin as well as the one who is not, the fellow traveler, the wayfarer and the slaves (and captives). Of course, Allah does not like the conceited braggarts.