Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) narrates: The Prophet (peace and blessings of Allah be upon him) was leading us in prayer, and he began to recite a surah, but he omitted one verse from it. When he finished the prayer, I said: O Messenger of Allah! Has such-and-such verse been abrogated? The Prophet (peace and blessings of Allah be upon him) said: "No." I said: You did not recite it. The Prophet (peace and blessings of Allah be upon him) said: "Why did you not prompt me?"
Hadith Referenceسنن الدارقطني / كتاب الصلاة / 1492
Hadith Takhrij«أخرجه ابن خزيمة فى ((صحيحه)) برقم: 1647، والدارقطني فى ((سننه)) برقم: 1492، وعبد الله بن أحمد بن حنبل فى زوائده على ((مسند أحمد))، 21529، والطبراني فى ((الأوسط)) برقم: 6412»