Muwatta Malik
Shortening the Prayer
Hadith #22
9.22
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، عَنْ عُمَرَ بْنِ الْخَطَّابِ، مِثْلَ ذَلِكَ .
Yahya related the same as that to me from Malik from Zayd ibn Aslam from his father from Umar ibn al-Khattab