Man Lā Yaḥḍuruh al-Faqīh

Hadith 247
fastingdua
1818 - وَ فِي أَوَّلِ يَوْمٍ مِنَ اَلْمُحَرَّمِ دَعَا زَكَرِيَّا عَلَيْهِ اَلسَّلاَمُ رَبَّهُ عَزَّ وَ جَلَّ فَمَنْ صَامَ ذَلِكَ اَلْيَوْمَ اِسْتَجَابَ اَللَّهُ لَهُ كَمَا اِسْتَجَابَ لِزَكَرِيَّا عَلَيْهِ اَلسَّلاَمُ ».
Hadith.1818 - It is narrated: "On the first day of Muharram, Zakariya (as) supplicated to his Lord (azj), the Almighty. Whoever fasts on that day, Allah (swt) will answer their supplication just as He answered Zakariya (as)."
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq