Talhah bin Ubaidullah RA reported: At the sight of
the new moon (of the lunar month), the Prophet
(sallallaahu ’alayhi wa sallam) used to supplicate:
"Allahumma ahillahu 'alaina bil-amni wal-iman,
was-salamati wal-Islam, Rabbi wa Rabbuk-Allah,
Hilalu rushdin wa khairin (O Allah, let this moon
appear on us with security and Iman; with safety
and Islam. (O moon!) Your Rubb and mine is
Allah. May this moon be bringing guidance and
good)." (Tirmidhi)