Muwatta
Malik
موطأ مالك
09
Shortening the Prayer
كتاب قصر الصلاة فى السفر
Chapter 20: Turning and Clapping when Necessary during the Prayer
Muwatta Malik 399
Yahya related to me from Malik from Nafi that Ibn Umar would never turn around when praying.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ ابْنَ عُمَرَ، لَمْ يَكُنْ يَلْتَفِتُ فِي صَلاَتِهِ .