Hadith 503690
Chapter 9: Shortening the Prayer - كتاب قصر الصلاة فى السفر
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ لاَ يَمُرُّ بَيْنَ يَدَىْ أَحَدٍ وَلاَ يَدَعُ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar would neither pass in front of anyone, nor let anyone pass in front of him.
Reference Muwatta Malik 503690
USC-MSA web (English) reference : Book 9, Hadith 40