The Sufficient (Vol 2) · Hadith 387 (#Ḥadīth #17)
Chapter 56 | Silence and Controlling the Tongue
17ـ وَبِهَذَا الإسْنَادِ قَالَ قَالَ رَسُولُ الله (صَلَّى اللهُ عَلَيْهِ وآلِه) إِنْ كَانَ فِي شَيْءٍ شُؤْمٌ فَفِي اللِّسَانِ.
17. Through the same chain of narrators it is narrated from the Messenger of Allah has said, the following: “The Messenger of Allah has said, ‘If there is any wickedness, it is in the tongue.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).