Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:429Bundār Muḥammad b. Bashhār > Abū ʿĀmir > al-ʿAqadī ʿAbd al-Malik b. ʿAmr > Sufyān > Abū Isḥāq > ʿĀṣim b. Ḍamrah > ʿAlī > Kān

"Messenger of Allah (S) would pray four Rak'ah before Al-Asr separating between them with At-Taslim upon the angels that are close (to Allah) and those who follow them among the Muslims and the believers."  

الترمذي:٤٢٩حَدَّثَنَا بُنْدَارٌ مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا أَبُو عَامِرٍ هُوَ الْعَقَدِيُّ عَبْدُ الْمَلِكِ بْنُ عَمْرٍو حَدَّثَنَا سُفْيَانُ عَنْ أَبِي إِسْحَاقَ عَنْ عَاصِمِ بْنِ ضَمْرَةَ عَنْ عَلِيٍّ قَالَ

كَانَ النَّبِيُّ ﷺ يُصَلِّي قَبْلَ الْعَصْرِ أَرْبَعَ رَكَعَاتٍ يَفْصِلُ بَيْنَهُنَّ بِالتَّسْلِيمِ عَلَى الْمَلاَئِكَةِ الْمُقَرَّبِينَ وَمَنْ تَبِعَهُمْ مِنَ الْمُسْلِمِينَ وَالْمُؤْمِنِينَ  

قَالَ أَبُو عِيسَى وَفِي الْبَابِ عَنِ ابْنِ عُمَرَ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو قَالَ أَبُو عِيسَى حَدِيثُ عَلِيٍّ حَدِيثٌ حَسَنٌ وَاخْتَارَ إِسْحَاقُ بْنُ إِبْرَاهِيمَ أَنْ لاَ يُفْصَلَ فِي الأَرْبَعِ قَبْلَ الْعَصْرِ وَاحْتَجَّ بِهَذَا الْحَدِيثِ وَقَالَ إِسْحَاقُ وَمَعْنَى أَنَّهُ يَفْصِلُ بَيْنَهُنَّ بِالتَّسْلِيمِ يَعْنِي التَّشَهُّدَ وَرَأَى الشَّافِعِيُّ وَأَحْمَدُ صَلاَةَ اللَّيْلِ وَالنَّهَارِ مَثْنَى مَثْنَى يَخْتَارَانِ الْفَصْلَ فِي الأَرْبَعِ قَبْلَ الْعَصْرِ

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:343Ismāʿīl b. Masʿūd > Khālid > Shuʿbah > Abū Isḥāq > ʿĀṣim b. Ḍamrah > Saʾalnā ʿAlī

[Machine] About the prayer of the Messenger of Allah ﷺ? He described and said, "He used to pray four units before Dhuhr and two units after it. And he used to pray four units before Asr and separate between each two units with the Tasleem on the close angels, the prophets, and those who followed them among the Muslims."  

الكبرى للنسائي:٣٤٣أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ قَالَ حَدَّثَنَا خَالِدٌ حَدَّثَنَا شُعْبَةُ قَالَ أَخْبَرَنَا أَبُو إِسْحَاقَ أَنَّهُ سَمِعَ عَاصِمَ بْنَ ضَمْرَةَ يَقُولُ سَأَلْنَا عَلِيًّا

عَنْ صَلَاةِ رَسُولِ اللهِ ﷺ؟ فَوَصَفَ وَقَالَ كَانَ «يُصَلِّي قَبْلَ الظُّهْرِ أَرْبَعًا وَبَعْدَهَا رَكْعَتَيْنِ وَقَبْلَ الْعَصْرِ أَرْبَعًا وَيَفْصِلُ بَيْنَ كُلِّ رَكْعَتَيْنِ بِالتَّسْلِيمِ عَلَى الْمَلَائِكَةِ الْمُقَرَّبِينَ وَالنَّبِيِّينَ وَمَنِ اتَّبَعَهُمْ مِنَ الْمُسْلِمِينَ»