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 تَقَبَّلْ مِنَّا إِنَّكَ أَنْتَ السَّمِيعُ الْعَلِيمُ وَتُبْ عَلَيْنَا إِنَّكَ أَنْتَ التَّوَّابُ الرَّحِيمُ
O Allah, accept from us, for You are the All-Hearing, the All-Knowing. And turn to us in mercy, for You are the Acceptor of repentance, the Most Merciful.
Sahihاللَّهُمَّ تَقَبَّلْ صِيَامِي وَقِيَامِي وَرُكُوعِي وَسُجُودِي
O Allah, accept my fasting, my standing in prayer, my bowing, and my prostration.
Atharاللَّهُمَّ أَهِلَّهُ عَلَيْنَا بِالْأَمْنِ وَالْإِيمَانِ وَالسَّلَامَةِ وَالْإِسْلَامِ رَبِّي وَرَبُّكَ اللَّهُ
O Allah, let this moon rise upon us with security, faith, safety, and Islam. My Lord and your Lord is Allah.
Hasanاللَّهُمَّ 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