What to say upon seeing the New Moon
Bismillah ar-Rahman ar-Rahim
WE RELATE FROM the Musnad of ad-Darimi and the book of at-Tirmidhi, from Talha ibn `Ubaydullah 
who reported that when the Messenger of Allah 
saw the new moon he said:
"O Allah, make it rise over us with good fortune, faith, peace, and submission. My Lord and your Lord is Allah." At-Tirmidhi describes this hadith as hasan.
Allahumma ahillahu `alayna bi-l-yumni wa-l-iman,
wa-s-salamati wa-l-Islam, Rabbi wa Rabbuka-llah.
Note: Ibn Hajar grades it as hasan.
Source: The Book of Remembrances (Kitab al-Adhkar) of Imam Yahya ibn Sharaf an-Nawawi 
. Translated by Idris Esau, Safaruk Chowdury and Abdassamad Clarke. Revised and edited by Muhammad Isa Waley. Turath Publishing 2014.
