Sunan an-Nasai 19585
In-book no 4849أَخْبَرَنَا يُوسُفُ بْنُ عِيسَى، قَالَ أَنْبَأَنَا الْفَضْلُ بْنُ مُوسَى، قَالَ أَنْبَأَنَا يَزِيدُ، - وَهُوَ ابْنُ زِيَادِ بْنِ أَبِي الْجَعْدِ - عَنْ جَامِعِ بْنِ شَدَّادٍ، عَنْ طَارِقٍ الْمُحَارِبِيِّ، أَنَّ رَجُلاً، قَالَ يَا رَسُولَ اللَّهِ هَؤُلاَءِ بَنُو ثَعْلَبَةَ الَّذِينَ قَتَلُوا فُلاَنًا فِي الْجَاهِلِيَّةِ . فَخُذْ لَنَا بِثَأْرِنَا . فَرَفَعَ يَدَيْهِ حَتَّى رَأَيْتُ بَيَاضَ إِبْطَيْهِ وَهُوَ يَقُولُ " لاَ تَجْنِي أُمٌّ عَلَى وَلَدٍ " . مَرَّتَيْنِ .
It was narrated from Tariq and Muharibi that a manh said: "O Messenger of Allah, these are Banu Tha'labah who killed so and so during the Jahiliyyah: avenger us! He raised his arms until the whiteness of his armpits could be seen and said: "No mother's sin can affect her child," twice. (Shaih)