ENOfficial
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.
Source: sunnah.com
Other translations
Arabic
وَعَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «رَحِمَ اللَّهُ امْرَءًا صَلَّى قَبْلَ الْعَصْرِ أَرْبَعًا» . رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ
sunnah.com