It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: May Allah have mercy on the person who performs four rak‘ahs before ‘Asr.
Hadith Referenceالفتح الربانی / أبواب الأذ كار الواردة عقب الصلاة / 2061
Sayyiduna Ali (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) used to perform four rak‘ahs before ‘Asr, and between every two rak‘ahs, he would separate them by offering salutations of peace upon the close angels, the prophets, and the Muslims and believers who follow them. That is, after every two rak‘ahs, he would say salam.
Hadith Referenceالفتح الربانی / أبواب الأذ كار الواردة عقب الصلاة / 2062
Hadith Gradingمحدثین:اسناده قوي۔ أخرجه ابن ماجه: 1161
Hadith Takhrij«اسناده قوي۔ أخرجه ابن ماجه: 1161، والترمذي: 424، 429، 599، والنسائي: 2/ 120 ، (انظر مسند أحمد ترقيم الرسالة: 650، 1375 ترقیم بيت الأفكار الدولية: 1375»