(510) بَابُ الاسْتِئْذَانِ فِي حَوَانِيتِ السُّوقِ
'Ata' said, "Ibn 'Umar used to ask permission to enter market-stalls."
Reference: Al-Adab Al-Mufrad 1099
In-book reference: Book 43, Hadith 49
English translation: Book 43, Hadith 1099