كتاب الجهاد
Read the English translation first, with the original Arabic directly underneath.
Narrated Sahl ibn Sa'd:
The Prophet (ﷺ) 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 (ﷺ) as saying: And while it is raining.
ثِنْتَانِ لاَ تُرَدَّانِ، أَوْ قَلَّمَا تُرَدَّانِ : الدُّعَاءُ عِنْدَ النِّدَاءِ، وَعِنْدَ الْبَأْسِ حِينَ يُلْحِمُ بَعْضُهُمْ بَعْضًا