عن يزيدَ بنِ حيَّانَ قال: انْطَلَقْتُ أَنا وحُصَيْنُ بْنُ سَبْرَةَ، وعَمْرُو بن مُسْلِمٍ إلى زَيْدِ بْنِ أَرْقَمَ رضي اللّهُ عنهم، فلَمَّا جَلسْنا إِلَيهِ قالَ له حُصَيْنٌ: لَقَدْ لَقِيتَ يَا زَيْدُ خَيْرًا كَثِيرًا، رَأَيْتَ رسولَ اللّهِ صَلّى اللّهُ عَلَيْهِ وسَلَّم، وسمِعْتَ حَدِيثَهُ، وغَزَوْتَ مَعَهُ، وَصَلَّيْتَ خَلْفَهُ، لَقَدْ لَقِيتَ يا زَيْدُ خَيْرًا كَثِيرًا، حَدِّثْنَا يا زَيْدُ ما سمِعْتَ مِنْ رسولِ اللّهِ صَلّى اللّهُ عَلَيْهِ وسَلَّم. قال: يا ابْنَ أَخِي واللّهِ لَقَدْ كَبِرَتْ سِنِّي، وقَدُم عَهْدِي، ونسِيتُ بعْضَ الذي كنتُ أَعِي مِنْ رسولِ اللّهِ صَلّى اللّهُ عَلَيْهِ وسَلَّمَ، فَمَا حَدَّثْتُكُمْ فَاقْبَلُوا، وَمَا لا فَلا تُكَلِّفُونِيهِ ثُمَّ قال: قامَ رسولُ اللّهِ صَلّى اللّهُ عَلَيْهِ وسَلَّمَ يَوْمًا فِينَا خَطِيبًا بِمَاءٍ يُدْعَى خُمًّا بَيْنَ مكَّةَ وَالمَدِينَةَ، فَحَمِدَ اللّهَ، وَأَثْنى عَليْه، ووَعَظَ، وَذَكَّرَ، ثُمَّ قَالَ: «أَمَّا بعْدُ: أَلَا أَيُّهَا النَّاسُ، فَإِنَّمَا أَنَا بَشَرٌ يُوشِكُ أَنْ يَأْتِيَ رسولُ ربي فَأُجِيبَ، وأَنَا تَارِكٌ فِيكُمْ ثَقَلَيْنِ: أَوَّلُهُما كِتابُ اللّهِ، فِيهِ الهُدَى وَالنُّورُ، فَخُذُوا بِكِتابِ اللّهِ، وَاسْتَمْسِكُوا به» فَحثَّ على كِتَابِ اللّهِ، ورَغَّبَ فِيهِ. ثمَّ قَالَ «وأَهْلُ بَيْتِي، أُذَكِّرُكُمُ اللّهَ في أَهْلِ بَيْتِي، أُذَكِّرُكُمُ اللّهَ في أَهْلِ بَيْتي» فَقَالَ لَهُ حُصَيْنٌ: ومَنْ أَهْلُ بَيْتِهِ يا زيْدُ؟ أَلَيْسَ نِسَاؤُهُ مِن أَهْلِ بَيْتِهِ؟ قال: نِسَاؤُهُ مِنْ أَهْلِ بَيْتِهِ وَلَكِنْ أَهْلُ بَيْتِهِ مَنْ حُرِمَ الصَّدَقَةَ بَعْدَهُ، قَال: ومَنْ هُم؟ قَالَ: هُمْ آلُ عَليٍّ، وآلُ عَقِيلٍ، وآلُ جَعْفَرٍ، وَآلُ عبَّاسٍ، قَالَ: كُلُّ هؤُلاءِ حُرِمَ الصَّدَقَةَ؟ قَالَ: نَعَمْ. رواه مسلم. وفي روايةٍ: «أَلا وَإِنِّي تَارِكٌ فِيكُمْ ثَقَلَيْن: أَحَدُهُما كِتَابُ اللّهِ وَهُو حَبْلُ اللّهِ، مَنِ اتَّبَعَهُ كَانَ عَلَى الهُدَى، ومَنْ تَرَكَهُ كانَ على ضَلَالَةٍ».

Yazid ibn Hayyan reported: I set out together with Husayn ibn Sabrah and Amr ibn Muslim to Zayd ibn Arqam (may Allah be pleased with them). When we sat down with him, Husayn said to him, "Indeed, O Zayd, you have met with abundant good. You saw the Messenger of Allah (peace and blessings be upon him), heard his speech, fought alongside him, and prayed behind him. Indeed, O Zayd, you have met with abundant good. Narrate to us, O Zayd, what you heard from the Messenger of Allah (peace and blessings be upon him)." He said, "O son of my brother, by Allah, I have grown old in years, my time is long past, and I have forgotten some of what I used to retain from the Messenger of Allah (peace and blessings be upon him). So whatever I narrate to you, accept it, and whatever I do not, do not burden me with it." Then he said: One day the Messenger of Allah (peace and blessings be upon him) stood among us to deliver a sermon at a watering place called Khumm, between Makkah and Madinah. He praised Allah and extolled Him, admonished and reminded, and then said: "To proceed: O people, I am but a human being, and the messenger of my Lord is about to come to me, and I shall respond. I am leaving among you two weighty things: the first is the Book of Allah, in which there is guidance and light, so take hold of the Book of Allah and cling to it." He urged people to hold fast to the Book of Allah and roused their desire for it. Then he said: "And the members of my household. I remind you of Allah regarding the members of my household; I remind you of Allah regarding the members of my household." Husayn said to him, "And who are the members of his household, O Zayd? Are his wives not among the members of his household?" He replied, "His wives are among the members of his household, but the members of his household are those who are forbidden to receive charity after him." He said, "And who are they?" He replied, "They are the family of Ali, the family of Aqil, the family of Ja'far, and the family of Abbas." He said, "Are all of these forbidden charity?" He replied, "Yes." [Reported by Muslim] In another narration: "Behold, I am leaving among you two weighty things: one of them is the Book of Allah, which is the rope of Allah; whoever follows it is upon guidance, and whoever abandons it is in error."