أَعُوْذُ بِاللَّهِ مِنْ شَرِّ هٰذَا الغَاسِقِ

A‛oodhu Billahi Min Sharri Haazal Gasiq

I seek refuge in Allah from the misfortune of this disappearing moon.

Reference: Sahih (Albani). Sahihul Jame' 6918