اللَّهُمَّ تَقَبَّلْ مِنَّا رَمَضَانَ وَأَعِنَّا عَلَى صِيَامِ سِتٍّ مِنْ شَوَّالٍ
Allahumma taqabbal minna Ramadan wa a'inna 'ala siyami sittin min Shawwal
O Allah, accept our Ramadan and help us fast six days of Shawwal.
The Prophet ﷺ said: "Whoever fasts Ramadan and follows it with six days of Shawwal, it is as if he fasted the entire year." The math: 30 days × 10 (each good deed multiplied) = 300 days + 6 days × 10 = 60 days = 360 days = one full year. This du'a asks for two things: acceptance of Ramadan (the hard part is over, but was it accepted?) and strength for Shawwal (the bonus round that completes the equation).
Related Du'as
اللَّهُمَّ أَعِنِّي عَلَى صِيَامِهِ وَقِيَامِهِ
O Allah, help me to fast and pray during it (Ramadan).
Atharاللَّهُمَّ صَلِّ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ وَعَلَى آلِ إِبْرَاهِيمَ إِنَّكَ حَمِيدٌ مَجِيدٌ
O Allah, send blessings upon Muhammad and the family of Muhammad, as You sent blessings upon Ibrahim and the family of Ibrahim. Indeed, You are Praiseworthy and Glorious.
Sahihاللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ لَا إِلَٰهَ إِلَّا اللَّهُ وَاللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ وَلِلَّهِ الْحَمْدُ
Allah is the Greatest, Allah is the Greatest. There is no deity except Allah. And Allah is the Greatest, Allah is the Greatest, and to Allah belongs all praise.
Sahihاللَّهُمَّ أَعْتِقْ رِقَابَنَا وَرِقَابَ آبَائِنَا وَأُمَّهَاتِنَا وَأَزْوَاجِنَا وَأَوْلَادِنَا مِنَ النَّارِ
O Allah, free our necks and the necks of our fathers, our mothers, our spouses, and our children from the Fire.
Hasan