For Obedience

The following Dua should be recited 7 times after each Wajib prayer and at the time of reciting this Dua one should keep in mind the disobedient child. It is well experienced and effective.

رَبِّ ...اَصْلِحْ لِىْ فِىْ ذُرِّيَّتِىْ، اِنِّىْ تُبْتُ اِلَيْكَ وَ اِنِّىْ مِنَ الْمُسْلِمِيْنَ

Transliteration:

"rabbe … ashleh lee fee zurriyyatee, innee tubto elayka wa innee menal muslemeen."

Translation:

"O Lord… do good unto me in respect of my offspring: Verily 1 turn unto Thee (repentant), and verily I am one of the Muslims."