Arabic (Original)
أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ بِشْرَانَ الْعَدْلُ بِبَغْدَادَ أنبأ إِسْمَاعِيلُ بْنُ مُحَمَّدٍ الصَّفَّارُ ثنا عَبْدُ الْكَرِيمِ بْنُ الْهَيْثَمِ ثنا أَبُو الْيَمَانِ أنبأ شُعَيْبُ بْنُ أَبِي حَمْزَةَ قَالَ قَالَ نَافِعٌ كَانَ ابْنُ عُمَرَ ؓ يَقُولُ أَيُّمَا رَجُلٍ أَهْدَى هَدِيَّةً فَضَلَّتْ فَإِنْ كَانَتْ نَذْرًا أَبْدَلَهَا وَإِنْ كَانَتْ تَطَوُّعًا فَإِنْ شَاءَ أَبْدَلَهَا وَإِنْ شَاءَ تَرَكَهَا هَكَذَا رَوَاهُ مَالِكٌ عَنْ نَافِعٍ مَوْقُوفًا وَرَوَاهُ عَبْدُ اللهِ بْنُ عَامِرٍ الْأَسْلَمِيُّ عَنْ نَافِعٍ مَرْفُوعًا وَالصَّوَابُ مَوْقُوفٌ
English Translation
Abu al-Husayn ibn Bishran al-'Adl informed us in Baghdad, Isma'il ibn Muhammad al-Saffar informed us, Abd al-Karim ibn al-Haytham narrated to us, Abu al-Yaman informed us, Shu'ayb ibn Abi Hamzah informed us. He said: Nafi' said: Ibn Umar (may Allah be pleased with him) used to say: "Any man who designates a sacrificial animal and it goes missing - if it was a vow, he must replace it. If it was voluntary, then if he wishes he may replace it, and if he wishes he may leave it." Malik also narrated this from Nafi' as a mawquf report (stopped at the companion). Abdullah ibn Amir al-Aslami narrated it from Nafi' as a marfu' report (attributed to the Prophet), but the correct version is the mawquf one.