Duas for supplication during the month of Ramadan

When you are fasting, and someone is rude to you

اِنَّيْ صَائِمٌ ، اِنِّيْ صَائمٌ

Inni sa'iimu, inni sa'iimu

I am fasting, I am fasting
[Sahih al-Bukhari, Fath al-Bari of Al-Asqalani; 4:1-3, Muslim; 2:806]

On Lailatul Qadr - the Night of Power

Aishah (radhiya Allahu Ta'ala anha), that she said: "O Messenger of Allah! What if I knew which night Lailatul-Qadr was, then what should I say in it?" He said 'Say

اَللَّهُمَّ اِنَّكَ عَفُوٌّ ، تُحِبُّ الْعَفْوَ فَاعْفُ عَنِّي

Allahumma innaka 'affuwwun tuhibbul 'afwa fa'fu 'anni' "

O Allah You are The One Who pardons greatly, and loves to pardon, so pardon me.
[at Tirmidhi]