'Aishah (May Allah be pleased with her) reported:

I asked: "O Messenger of Allah! If I realize Lailat-ul-Qadr (Night of Decree), what should I supplicate in it?" He (ﷺ) replied, "You should supplicate:

 

Allahumma innaka 'afuwwun, tuhibbul-'afwa, fa'fu 'anni

اللهم إنك عفو تحب العفو فاعفُ عني‏

(O Allah, You are Most Forgiving, and You love forgiveness; so forgive me)."

.

أَفْطَرَ عِنْدَكُمُ الصَّائِمُونَ وَأَكَلَ طَعَامَكُمُ الأَبْرَارُ وَصَلَّتْ عَلَيْكُمُ الْمَلاَئِكَةُ

Aftara ‘indakumus-saimun, wa akala ta’amakumul-abrar, wa sallat ‘alaikumul- mala’ikah

May the fasting (men) break their fast with you, and the pious eat your food, and the angels pray for blessing on you

Ibn Majah: 1747

ذَهَبَ الظَّمَأُ وَابْتَلَّتِ الْعُرُوقُ وَثَبَتَ الأَجْرُ إِنْ شَاءَ اللَّهُ

Dhahaba al-zama’ wa abtalat al-‘urooq wa thabata al-ajr in sha Allaah

Thirst is gone, the veins are moistened and the reward is certain if Allaah wills.

Abu Dawud: 2357

• For Breaking Fast - Iftar Dua - 2

اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ

Allahumma laka sumtu wa ala rizq-ika-aftartu

O Allah! For You I have fasted and upon your provision, I have broken my fast.

Abu Dawud: 2358

بِسْمِ اللَّهِ

Bismillah

In the name of Allah

• For Fasting - Sehri Dua - 2

وَبِصَوْمِ غَدٍ نَّوَيْتُ مِنْ شَهْرِ رَمَضَانَ

Wa bisawmi ghadinn nawaiytu min shahri Ramadan
I intend to keep the fast for tomorrow in the month of Ramadan

NOTE: There is no reference in Hadith for this Dua.

اللَّهُمَّ أَهْلِلْهُ عَلَيْنَا بِالْيُمْنِ وَالإِيمَانِ وَالسَّلاَمَةِ وَالإِسْلاَمِ رَبِّي وَرَبُّكَ اللَّهُ

Allahumma ahlilhu `alainā bil-yumni wal-iman, was-salamati wal-Islam, rabbi wa rabbuk Allah

O Allah, bring it over us with blessing and faith, and security and Islam. My Lord and your Lord is Allah.

Tirmidhi: 3451