O Allah, reward my parents on my behalf with the best reward. — Parents
اللَّهُمَّ اجْزِ وَالِدَيَّ عَنِّي خَيْرَ الْجَزَاءِ
Transliteration: Allaahummajzi waalidayya 'annee khayral-jazaa'
Translation: O Allah, reward my parents on my behalf with the best reward.
Reference: General supplication