Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2534
Narrated Sahl ibn Sa'd:
The Prophet (peace_be_upon_him) said: Two (prayers) are not rejected, or seldom rejected: Prayer at the time of the call to prayer, and (the prayer) at the time of fighting, when the people grapple with each other. Musa said: Rizq ibn Sa'id ibn AbdurRahman reported from AbuHazim on the authority of Sahl ibn Sa'd from the Prophet (peace_be_upon_him) as saying: And while it is raining.