عَنْ عَبَّادِ بْنِ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ رَضِيَ اللَّهُ عَنْهُ قَالَ أَتَى الْحَارِثُ بْنُ خَزَمَةَ رَضِيَ اللَّهُ عَنْهُ بِهَاتَيْنِ الْآيَتَيْنِ مِنْ آخِرِ بَرَاءَةَ لَقَدْ جَاءَكُمْ رَسُولٌ مِنْ أَنْفُسِكُمْ إِلَى عُمَرَ بْنِ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ فَقَالَ مَنْ مَعَكَ عَلَى هَذَا قَالَ لَا أَدْرِي وَاللَّهِ إِلَّا أَنِّي أَشْهَدُ لَسَمِعْتُهَا مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَوَعَيْتُهَا وَحَفِظْتُهَا فَقَالَ عُمَرُ رَضِيَ اللَّهُ عَنْهُ وَأَنَا أَشْهَدُ لَسَمِعْتُهَا مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ ثُمَّ قَالَ لَوْ كَانَتْ ثَلَاثَ آيَاتٍ لَجَعَلْتُهَا سُورَةً عَلَى حِدَةٍ فَانْظُرُوا سُورَةً مِنَ الْقُرْآنِ فَضَعُوهَا فِيهَا فَوَضَعْتُهَا فِي آخِرِ بَرَاءَةَ
It is narrated from ‘Abad bin ‘Abdullah bin Zubair that Harith bin Khuzmah brought these last two verses of Surah At-Tawbah to Sayyiduna ‘Umar bin Khattab (may Allah be pleased with him). He said: Who is a witness with you for these? He replied: By Allah! I do not know, but I bear witness that I heard these verses from the Noble Prophet (peace and blessings be upon him) and I memorized them. Sayyiduna ‘Umar (may Allah be pleased with him) said: I also bear witness that I heard them from the Messenger of Allah (peace and blessings be upon him). If these were three verses, I would have made them a separate surah. Now you see which surah is most suitable for these verses, so write them in it. So I wrote them at the end of Surah At-Tawbah.