وَأَصْلِحْ لِي فِي ذُرِّيَّتِي إِنِّي تُبْتُ إِلَيْكَ وَإِنِّي مِنَ الْمُسْلِمِينَ
Wa aslih li fi dhurriyyati inni tubtu ilayka wa inni minal-Muslimin
And set right for me my offspring. Indeed, I have repented to You, and indeed I am of the Muslims.
"Aslih" — rectify, set right, fix. This du'a acknowledges that your children may have problems you cannot solve — behavioral issues, spiritual crises, worldly difficulties. You ask Allah to fix what is broken in your offspring. And the tie to repentance is deliberate: your own tawbah purifies the soil in which your family grows. A parent's spiritual state directly affects their children.
Related Du'as
أُعِيذُكُمَا بِكَلِمَاتِ اللَّهِ التَّامَّةِ مِنْ كُلِّ شَيْطَانٍ وَهَامَّةٍ وَمِنْ كُلِّ عَيْنٍ لَامَّةٍ
I seek refuge for you both in the perfect words of Allah, from every devil, every venomous creature, and every envious evil eye.
Sahihرَبِّ لَا تَذَرْنِي فَرْدًا وَأَنْتَ خَيْرُ الْوَارِثِينَ
My Lord, do not leave me alone with no offspring, while You are the best of inheritors.
Sahihرَبِّ اجْعَلْنِي مُقِيمَ الصَّلَاةِ وَمِن ذُرِّيَّتِي رَبَّنَا وَتَقَبَّلْ دُعَاءِ رَبَّنَا اغْفِرْ لِي وَلِوَالِدَيَّ وَلِلْمُؤْمِنِينَ يَوْمَ يَقُومُ الْحِسَابُ
My Lord, make me an establisher of prayer, and from my descendants. Our Lord, accept my supplication. Our Lord, forgive me and my parents and the believers on the Day the account is established.
Sahihاللَّهُمَّ أَحْسِنْ عَاقِبَتَنَا فِي الْأُمُورِ كُلِّهَا وَأَجِرْنَا مِنْ خِزْيِ الدُّنْيَا وَعَذَابِ الْآخِرَةِ
O Allah, make good the outcome of all our affairs and protect us from the disgrace of this world and the punishment of the Hereafter.
Sahih