"Whoever catches up with one Rak'ah of 'Asr prayer before the sun sets, or catches up with one Rak'ah of Fajr before the sun rises, has caught it."
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَدْرَكَ رَكْعَةً مِنْ صَلاَةِ الْعَصْرِ قَبْلَ أَنْ تَغِيبَ الشَّمْسُ أَوْ أَدْرَكَ رَكْعَةً مِنَ الْفَجْرِ قَبْلَ طُلُوعِ الشَّمْسِ فَقَدْ أَدْرَكَ