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.  

قَالَ رَسُولُ اللَّهِ ﷺ ثِنْتَانِ لاَ تُرَدَّانِ أَوْ قَلَّمَا تُرَدَّانِ الدُّعَاءُ عِنْدَ النِّدَاءِ وَعِنْدَ الْبَأْسِ حِينَ يُلْحِمُ بَعْضُهُمْ بَعْضًا قَالَ مُوسَى وَحَدَّثَنِي رِزْقُ بْنُ سَعِيدِ بْنِ عَبْدِ الرَّحْمَنِ عَنْ أَبِي حَازِمٍ عَنْ سَهْلِ بْنِ سَعْدٍ عَنِ النَّبِيِّ ﷺ قَالَ وَوَقْتَ الْمَطَرِ