رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 877
The Book of Greetings
Seeking Permission to Enter by Stating One's Name
وَعَنْ جَابِرٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: أَتَيْتُ النَّبِيَّ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ فَدَقَقْتُ الْبَابَ، فَقَالَ "مَنْ ذَا؟" فَقُلْتُ: أَنَا، فَقَالَ: "أَنَا أَنَا؟!" كَأَنَّهُ كَرِهَهَا ((مُتَّفَقٌ عَلَيْهِ)).
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. [Al-Bukhari and Muslim].
Riyad as-Salihin, 877