اللَّهُمَّ تَقَبَّلْ صِيَامِي وَقِيَامِي وَرُكُوعِي وَسُجُودِي
Allahumma taqabbal siyami wa qiyami wa ruku'i wa sujudi
O Allah, accept my fasting, my standing in prayer, my bowing, and my prostration.
The anxiety of acceptance — will Allah accept my Ramadan? The Salaf used to spend six months after Ramadan asking Allah to accept the worship they did during it. Acceptance is not guaranteed by performance. You can fast perfectly and have it rejected because of a character flaw. This du'a asks for the one thing that matters: that your effort counts, that it registers, that it is not returned to you empty.
Related Du'as
اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ
O Allah, for You I have fasted and with Your provision I break my fast.
Hasanاللَّهُمَّ سَلِّمْنِي لِرَمَضَانَ وَسَلِّمْ رَمَضَانَ لِي وَتَسَلَّمْهُ مِنِّي مُتَقَبَّلًا
O Allah, keep me safe for Ramadan, keep Ramadan safe for me, and accept it from me.
Hasanاللَّهُمَّ ارْحَمْنِي بِالْقُرْآنِ وَاجْعَلْهُ لِي إِمَامًا وَنُورًا وَهُدًى وَرَحْمَةً
O Allah, have mercy on me through the Quran, and make it for me a guide, a light, a source of guidance, and a mercy.
Hasanاللَّهُمَّ 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.
Hasan