Not graded
Musnad Ahmad 10811
Narrator:Abu Sa‘īd al-Khudri
وَإِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَوْ يَعْلَمُ النَّاسُ مَا فِي التَّأْذِينِ لَتَضَارَبُوا عَلَيْهِ بِالسُّيُوفِ
This hadith has no English translation yet: the Arabic text, the reference and the grade are shown here.
Reported by Ahmad (No. 10811).