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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai-kubra:1571 – ʿUthmān b. ʿAbdullāh > ʿUbaydullāh b. Muʿādh b. Muʿādh from my father > ʿImrān b. Ḥudayr > Saʾalt Lāḥiq > al-Rakʿatayn ʿInd Ghurūb al-Shams

"I asked Lahiq about the two Rak'ahs before sunset. He said: "Abdullah bin Az-Zubair used to pray them, and Mu'awiyah sent word to him asking: 'What are these two Rak'ahs at sunset?' He had to refer to Umm Salamah, and Umm Salamah said: 'The Messenger of Allah ﷺ used to pray two Rak'ahs before 'Asr, then he was distracted and did not pray them, so he prayed them when the sun set, and I never saw him pray them before or after that.'" (Using translation from Nasāʾī 581)  

الكبرى للنسائي:١٥٧١ – أَخْبَرَنِي عُثْمَانُ بْنُ عَبْدِ اللهِ قَالَ حَدَّثَنَا عُبَيْدُ اللهِ بْنُ مُعَاذِ بْنِ مُعَاذٍ قَالَ حَدَّثَنَا أَبِي قَالَ حَدَّثَنَا عِمْرَانُ بْنُ حُدَيْرٍ قَالَ سَأَلْتُ لَاحِقًا عَنِ الرَّكْعَتَيْنِ عِنْدَ غُرُوبِ الشَّمْسِ فَقَالَ كَانَ عَبْدُ اللهِ بْنُ الزُّبَيْرِ يُصَلِّيهِمَا فَأَرْسَلَ إِلَيْهِ مُعَاوِيَةُ مَا هَاتَانِ الرَّكْعَتَانِ عِنْدَ غُرُوبِ الشَّمْسِ؟ فَاضْطَرَّ الْحَدِيثَ إِلَى أُمِّ سَلَمَةَ فَقَالَتْ

أُمُّ سَلَمَةَ «إِنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي الرَّكْعَتَيْنِ قَبْلَ الْعَصْرِ فَشُغِلَ عَنْهُمَا فَرَكَعَهُمَا حِينَ غَابَتِ الشَّمْسُ وَلَمْ أَرَهُ يُصَلِّيهِمَا قَبْلُ وَلَا بَعْدُ»  

See similar narrations below:

Collected by Nasāʾī
nasai:581 – ʿUthmān b. ʿAbdullāh > ʿUbaydullāh b. Muʿādh from my father > ʿImrān b. Ḥudayr > Saʾalt Lāḥiq > al-Rakʿatayn Qabl Ghurūb al-Shams

"I asked Lahiq about the two Rak'ahs before sunset. He said: "Abdullah bin Az-Zubair used to pray them, and Mu'awiyah sent word to him asking: 'What are these two Rak'ahs at sunset?' He had to refer to Umm Salamah, and Umm Salamah said: 'The Messenger of Allah ﷺ used to pray two Rak'ahs before 'Asr, then he was distracted and did not pray them, so he prayed them when the sun set, and I never saw him pray them before or after that.'"  

النسائي:٥٨١ – أَخْبَرَنَا عُثْمَانُ بْنُ عَبْدِ اللَّهِ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ قَالَ أَنْبَأَنَا أَبِي قَالَ حَدَّثَنَا عِمْرَانُ بْنُ حُدَيْرٍ قَالَ سَأَلْتُ لاَحِقًا عَنِ الرَّكْعَتَيْنِ قَبْلَ غُرُوبِ الشَّمْسِ فَقَالَ كَانَ عَبْدُ اللَّهِ بْنُ الزُّبَيْرِ يُصَلِّيهِمَا فَأَرْسَلَ إِلَيْهِ مُعَاوِيَةُ مَا هَاتَانِ الرَّكْعَتَانِ عِنْدَ غُرُوبِ الشَّمْسِ فَاضْطَرَّ الْحَدِيثَ إِلَى أُمِّ سَلَمَةَ فَقَالَتْ

أُمُّ سَلَمَةَ إِنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ قَبْلَ الْعَصْرِ فَشُغِلَ عَنْهُمَا فَرَكَعَهُمَا حِينَ غَابَتِ الشَّمْسُ فَلَمْ أَرَهُ يُصَلِّيهِمَا قَبْلُ وَلاَ بَعْدُ