Hadithcore
Riyad as-Salihin, 877

Jabir (May Allah be pleased with him) reported:

I went to the Prophet (ﷺ) and knocked at the door (to seek permission). He asked, "Who is there?" I said: "I". He repeated, " I, I?!" as if he disliked it. <b>[Al-Bukhari and Muslim]</b>.

وعن جابر رضي الله عنه قال‏:‏ أتيت النبي صلى الله عليه وسلم فدققت الباب، فقال ‏"‏من ذا‏؟‏‏"‏ فقلت‏:‏ أنا، فقال‏:‏ ‏"‏أنا أنا‏؟‏‏!‏‏"‏ كـأنه كرهها ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏

References1 variant
In-Book Reference
Book 5, Hadith 34
Sharh · explanationclick to expand
<b>Guidance from the Hadith:</b><br> 1) Upon seeking permission to enter, it is disliked that a person says, “It’s me, it’s me,” if these words do not make him known.<br> 2) It is permissible to criticize the person who violates the proper etiquette and to teach him what is right.