Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:422-414bIbn ʿUmar
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السيوطي:٤٢٢-٤١٤b

"عَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ الله ﷺ لِعُمَرَ بْنِ الْخَطَّابِ: لَوْ كَانَ بَعْدِى نَبِىٌّ لَكُنْتَ".  

[خط] الخطيب وقال: منكر، [كر] ابن عساكر في تاريخه

See similar narrations below:

Collected by Ṭabarānī
tabarani:14986Abū Muslim al-Kashhī > Yaḥyá b. Kathīr al-Nājī > Ibn Lahīʿah > Abū ʿUshhānah > ʿUqbah b. ʿĀmir > Rasūl

[Machine] The Messenger of Allah ﷺ said, "If there were to be a prophet after me, it would be Umar ibn al-Khattab."  

الطبراني:١٤٩٨٦حَدَّثَنَا أَبُو مُسْلِمٍ الْكَشِّيُّ ثَنَا يَحْيَى بْنُ كَثِيرٍ النَّاجِيُّ ثَنَا ابْنُ لَهِيعَةَ عَنْ أَبِي عُشَّانَةَ عَنْ عُقْبَةَ بْنِ عَامِرٍ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «لَو كَانَ بَعْدِي نَبِيٌّ كَانَ عُمَرَ بْنَ الْخَطَّابِ ؓ»  

tabarani:14604ʿIṣmah

[Machine] The Messenger of Allah ﷺ said: "If there were to be a prophet after me, it would have been 'Umar ibn Al-Khattab."  

الطبراني:١٤٦٠٤وَبِإِسْنَادِهِ عَنْ عِصْمَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «لَوْ كَانَ نَبِيٌّ بَعْدِي لَكَانَ عُمَرَ بْنَ الْخَطَّابِ»