Du'a for dutifulness to a mother

اللَّهُمَّ أَعِنِّي عَلَى بِرِّهَا حَتَّى تَرْضَى عَنِّي

Allahumma a'inni 'ala birriha hatta tarda 'anni

O Allah, help me to be dutiful to her until she is pleased with me.

A general supplication, not a narration from the Prophet (peace be upon him).