The Messenger of Allah ﷺ said, "Two prayers are not rejected, or rarely rejected, the supplication made at the time of the call to prayer, and the supplication made during battle when the fighters are locked in combat with one another."Musa said, Rizq bin Saeed bin Abdul-Rahman narrated to me from Abu Hazim, from Sahl bin Saad, from the Prophet ﷺ, and he added, "and at the time of rainfall."
حدثنا الحسن بن علي حدثنا ابن أبي مريم حدثنا موسى بن يعقوب الزمعي عن أبي حازم
قال رسول الله ﷺ ثنتان لا تردان أو قلما تردان الدعاء عند النداء وعند البأس حين يلحم بعضهم بعضا قال موسى وحدثني رزق بن سعيد بن عبد الرحمن عن أبي حازم عن سهل بن سعد عن النبي ﷺ قال ووقت المطر
No references are available.
[Sahih] Darimi narrated it, no. 1023, from the hadith of Ibn Abu Maryam, with this wording, and Ibn Khuzayma graded it sahih, no. 419. The hadith has supporting narrations in Ibn Hibban (al-Ihsan), 1717, 1761, and elsewhere. Ibn Jarud graded it sahih, no. 1069, as did Hakim, 1/198, 2/113, 114, and Dhahabi agreed with him. The hadith of Rizq bin Saeed at the beginning of the Book of Jihad is daif, due to the unknown status of the narrator.