مُوَطَّأُ مَالِكٍ
Muwatta Malik 385
Shortening the Prayer
وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ الْمَلاَئِكَةُ تُصَلِّي عَلَى أَحَدِكُمْ مَا دَامَ فِي مُصَلاَّهُ الَّذِي صَلَّى فِيهِ مَا لَمْ يُحْدِثِ اللَّهُمَّ اغْفِرْ لَهُ اللَّهُمَّ ارْحَمْهُ .
Yahya related to me from Malik from Abu'z Zinad from al-Araj from Abu Hurayra that the Messenger of Allah, (ﷺ), said, "The angels ask for blessings on each one of you as long as he is in the place where he has prayed and has not discharged anything. They say, 'Allah, forgive him. Allah have mercy on him.' "
Arabic/English book reference: Book 9, Hadith 54