Muwatta Imam Malik Book of Shortening the Prayer, Hadith 40

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.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ لاَ يَمُرُّ بَيْنَ يَدَىْ أَحَدٍ وَلاَ يَدَعُ أَحَدًا يَمُرُّ بَيْنَ يَدَيْهِ .