وعن سهل بن سعد رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم
"ثنتان لا تردان، أو قلما تردان: الدعاء عند النداء وعند البأس حين يلحم بعضهم بعضًا"
Sahl bin Sa'd (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Supplications at two times are never turned down (or said, "Are seldom turned down"), a supplication after the Adhan has been proclaimed, and a supplication during the battle combating the enemy."
[Abu Dawud].
Reported by Abu Dawud (No. 2540) and Ad-Darimi (No. 1174). Cited in Riyad as-Salihin (No. 1325).
Sahl ibn Sa‘d (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Two supplications are never rejected, or are rarely rejected: supplication made upon hearing the call to prayer and during battle when the two armies are engaged in fighting.”