Ayesha reported,

I imitated a man in the presence of the Prophet ﷺ, and he said, "It would not please me to imitate someone, even in exchange for such and such."I then said, "Messenger of Allah, Safiyyah is a woman who is..." and I gestured with my hand, indicating that she was short.He replied, "You have spoken a word that, were it mixed with the water of the sea, would taint it."

Azami 14904

Sahih

عن عائشة قال

حكيت للنبي ﷺ رجلا، فقال: ما يسرني أني حكيت رجلا، وأن لي كذا وكذا قال: فقلت: يا رسول الله، إن صفية امرأة- وقال بيده، كأنه يعني قصيرة- فقال: لقد مزجت بكلمة لو مزج بها ماء البحر مزجت.

الأعظمي 14904صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Superior moral conduct
Chapter
Vices of character
Section
Prohibition of backbiting
Numbering
Jami al-Kamil 14904 (2nd edition)
Azami 14904