Dua when sighting the new crescent moon
that when the Prophet ﷺ would see a crescent moon, he would say:
allāhumma ahlilhu ʿalaynā bi-al-yumni wa-al-īmān, wa-al-salāmati wa-al-islām, rabbī wa-rabbuka Allāh
(O Allah, bring it over us with blessing and faith, and security and Islam. My Lord and your Lord is Allah.)”
أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا رَأَى الْهِلاَلَ قَالَ:
«(اللَّهُمَّ أَهْلِلْهُ عَلَيْنَا بِالْيُمْنِ وَالإِيمَانِ وَالسَّلاَمَةِ وَالإِسْلاَمِ رَبِّي وَرَبُّكَ اللَّهُ)»