The Messenger of Allah ﷺ came in, and I could see from his face that something weighed heavily upon him. He performed ablution and then went out without speaking to anyone. I drew close to the chambers and heard him saying, "People, Allah says, 'Enjoin good and forbid evil before a time comes when you will call upon Me and I will not answer you, ask of Me and I will not grant you, and seek My aid and I will not aid you.'"
حدثنا أبو عامر حدثنا هشام يعني ابن سعد عن عمرو بن عثمان بن هانئ عن عاصم بن عمر بن عثمان عن عروة
دخل رسول الله ﷺ فعرفت في وجهه أن قد حفزه شيء فتوضأ ثم خرج فلم يكلم أحدا فدنوت من الحجرات فسمعته يقول يا أيها الناس إن الله عز وجل يقول مروا بالمعروف وانهوا عن المنكر من قبل أن تدعوني فلا أجيبكم وتسألوني فلا أعطيكم وتستنصروني فلا أنصركم
Its isnad is hasan. Uthman bin Amr bin Hani was deemed reliable by Ibn Hibban, though Mizzi considered him unknown. Asim bin Umar bin Uthman was deemed reliable by Ibn Hibban, while the other scholars said nothing about him. The hadith has already appeared at 23205.