" مَنْ أَدْرَكَ رَكْعَةً مِنْ صَلاَةِ الصُّبْحِ قَبْلَ أَنْ تَطْلُعَ الشَّمْسُ فَقَدْ أَدْرَكَ الصُّبْحَ وَمَنْ أَدْرَكَ رَكْعَةً مِنَ الْعَصْرِ قَبْلَ أَنْ تَغْرُبَ الشَّمْسُ فَقَدْ أَدْرَكَ الْعَصْرَ "
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said: "Whoever catches up with a Rak'ah of the Subh prayer before the sun rises, then he has caught up with Subh, and whoever catches up with a Rak'ah of 'Asr prayer before the sun sets, then he has caught up with 'Asr."