كتاب صلاة الجماعة
8  
Prayer in Congregation

Yahya related to me from Malik that Nafi said, "I stood behind Abdullah ibn Umar in one of the prayers when there was no one else with him, and he reached behind with his hand and placed me beside him."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّهُ قَالَ قُمْتُ وَرَاءَ عَبْدِ اللَّهِ بْنِ عُمَرَ فِي صَلاَةٍ مِنَ الصَّلَوَاتِ وَلَيْسَ مَعَهُ أَحَدٌ غَيْرِي فَخَالَفَ عَبْدُ اللَّهِ بِيَدِهِ فَجَعَلَنِي حِذَاءَهُ ‏.‏
Sunnah.com reference : Book 8, Hadith 15
USC-MSA web (English) reference : Book 8, Hadith 15
Arabic reference : Book 8, Hadith 304