(502) بَابُ إِذَا قَالَ: أَدْخُلُ؟ وَلَمْ يُسَلِّمْ
'Ata' reported that Abu Hurayra said, "When someone says, "CanI come in?" and does not give the key.'" 'Ata' said, "Peace?" and Abu Hurayrareplied, "Yes."
Reference: Al-Adab Al-Mufrad 1083
In-book reference: Book 43, Hadith 33
English translation: Book 43, Hadith 1083