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.
ahmad:1448Muḥammad b. Jaʿfar And Dhakar al-Ḥadīth Biqiṣṣah Fīh

[Machine] The son of my cousin Saad bin Malik mentioned the Banu Najiyah in the presence of the Messenger of Allah ﷺ , and he said, "They are part of me, but Saad was not mentioned in it."  

أحمد:١٤٤٨حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ وَذَكَرَ الْحَدِيثَ بِقِصَّةٍ فِيهِ فَقَالَ

ابْنُ أَخِي سَعْدِ بْنِ مَالِكٍ قَدْ ذَكَرُوا بَنِي نَاجِيَةَ عِنْدَ رَسُولِ اللهِ ﷺ فَقَالَ هُمْ حَيٌّ مِنِّي وَلَمْ يُذْكَرْ فِيهِ سَعْدٌ