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.
nasai-kubra:8408Zakariyyā b. Yaḥyá > ʿAbdullāh b. ʿUmar > Asbāṭ > Fiṭr > ʿAbdullāh b. Sharīk > ʿAbdullāh b. Rqym > Saʿd

[Machine] The Messenger of Allah, ﷺ , sent Abu Bakr with a letter, and when he was on part of the way, he sent Ali and asked for it back. Then he took it from him and proceeded on his way until he found Abu Bakr. He said to himself, "The Messenger of Allah, ﷺ , said, 'Nobody will convey my message except me or someone from my own family.'"  

الكبرى للنسائي:٨٤٠٨أَخْبَرَنَا زَكَرِيَّا بْنُ يَحْيَى قَالَ حَدَّثَنَا عَبْدُ اللهِ بْنُ عُمَرَ قَالَ حَدَّثَنَا أَسْبَاطٌ عَنْ فِطْرٍ عَنْ عَبْدِ اللهِ بْنِ شَرِيكٍ عَنْ عَبْدِ اللهِ بْنِ رقيمٍ عَنْ سَعْدٍ قَالَ

بَعَثَ رَسُولُ اللهِ ﷺ أَبَا بَكْرٍ بِبَرَاءَةَ حَتَّى إِذَا كَانَ بِبَعْضِ الطَّرِيقِ أَرْسَلَ عَلِيًّا فَأَخَذَهَا مِنْهُ ثُمَّ سَارَ بِهَا فَوَجَدَ أَبُو بَكْرٍ فِي نَفْسِهِ فَقَالَ قَالَ رَسُولُ اللهِ ﷺ «إِنَّهُ لَا يُؤَدِّي عَنِّي إِلَّا أَنَا أَوْ رَجُلٌ مِنِّي»