وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَائِشَةَ، أَنَّهَا كَانَتْ تُصَلِّي الضُّحَى ثَمَانِيَ رَكَعَاتٍ ثُمَّ تَقُولُ لَوْ نُشِرَ لِي أَبَوَاىَ مَا تَرَكْتُهُنَّ ‏.‏

Yahya related to me from Malik from Zayd ibn Aslam from A'ishathat she used to pray duha with eight rakas, and she would say, "Iwould never stop doing them even if my parents were to be brought backto life." Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 362
Web Ref:  Muwatta Imam Malik Book 9 Hadith 33