[Machine] About the Prophet ﷺ said, "If one of you comes while the imam is delivering the sermon or has already left, then let them pray two units (rak'ahs)."  

عَنِ النَّبِيِّ ﷺ قَالَ «إِذَا جَاءَ أَحَدُكُمْ وَالْإِمَامُ يَخْطُبُ أَوْ قَدْ خَرَجَ فَلْيُصَلِّ رَكْعَتَيْنِ»  

[Machine] Abu Saeed and Marwan came to propose, so he stood up to pray two units of prayer. Then the guards came and prevented him, so he said, "I would not abandon them when I had seen the Messenger of Allah ﷺ ordering them."  

جَاءَ أَبُو سَعِيدٍ وَمَرْوَانُ يَخْطُبُ فَقَامَ يُصَلِّي رَكْعَتَيْنِ فَأَتَاهُ الْحَرَسُ يَمْنَعُونَهُ فَقَالَ «مَا كُنْتُ أَتْرُكُهُمَا وَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَأْمُرُ بِهِمَا»  

[Machine] I saw Al-Hassan praying two units of prayer while the imam was delivering a sermon.  

رَأَيْتُ الْحَسَنَ «يُصَلِّي رَكْعَتَيْنِ وَالْإِمَامُ يَخْطُبُ»