اَللّٰهُمَّ أَهِلَّهُ عَلَيْنَا بِالْيُمْنِ وَالْإِيْمَانِ ، وَالسَّلاَمَةِ وَالْإِسْلاَمِ ، رَبِّيْ وَرَبُّكَ اللّٰهُ
Translation: O Allah, let this moon (month) pass over us with blessings, firm belief, safety, and in the state of Islam. My Lord and your Lord is Allah.
Transliteration: Allāhumma ahillahū ʿalaynā bi-l-yumni wa-l-īmān, wa-s-salāmati wa-l-Islām, Rabbī wa Rabbuka-llāh.
Virtue: Ṭalḥah b. ʿUbaydillāh (raḍiy Allāhu ʿanhu) reported that when the Messenger of Allah ﷺ saw the new moon, he said [the above]. (Tirmidhī 3451)