(17) باب مَنْ أَدْرَكَ رَكْعَةً مِنَ الْعَصْرِ قَبْلَ الْغُرُوبِ
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "If anyone of you can get one rak`a of the `Asr prayer before sunset, he should complete his prayer. If any of you can get one rak`a of the Fajr prayer before sunrise, he should complete his prayer." (RU)
Reference (RU): Sahih al-Bukhari 556 (RU)
In-book reference (RU): Book 9, Hadith 33 (RU)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 10, Hadith 531 (RU)