مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1170
Prayer
The sunan prayers and their virtues - Section 2
وَعَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «رَحِمَ اللَّهُ امْرَءًا صَلَّى قَبْلَ الْعَصْرِ أَرْبَعًا» . رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ
Ibn ‘Umar reported God’s Messenger as saying, “God show mercy to a man who prays four rak'as before the afternoon prayer!” Ahmad, Tirmidhi and Abu Dawud transmitted it.
Mishkat al-Masabih, 1170حسن (الألباني)