Hadith:

… ثلاثة لا تردُّ دعوتُهم . . . والصَّائمُ حتَّى يفطرَ ودعوةُ المظلومِ

On the authority of Abu Hurariah that the Messenger sallahu alayhi wa salam said:

“Three people whose supplication is not rejected…the fasting person until they break their fast and the supplication of the oppressed…”

[Saheeh Ibn Majah no. 1432]

Imam al-Munaawi rahimahullah said in explanation of a Hadith similiar to this:

ومراده كامل الصوم الذي صان جميع جوارحه عن المخالفات فيجاب دعاؤه لطهارة جسده بمخالفة هواه

“The intent is the complete fast which safeguards all the limbs from the oppositions. So his supplication is answered because of the purity of his body due to opposing his desires”

[Fayd ul-Qaadir]

Translated by

Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan