صحيح البخاري Sahih Bukhari كتاب مواقيت الصلاة The Book of The Times of As-Salat (The Prayers) and Its Superiority
بَابُ مَنْ أَدْرَكَ مِنَ الْفَجْرِ رَكْعَةً:

(28) Chapter. Whoever got (or was able to offer) one Raka of the Fajr prayer (in time) [One Raka means, one standing, one bowing, and two prostrations].

1 hadith
Hadith 579
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ ، عَنْ مَالِكٍ ، عَنْ زَيْدِ بْنِ أَسْلَمَ ، عَنْ عَطَاءِ بْنِ يَسَارٍ ، وَعَنْ بُسْرِ بْنِ سَعِيدٍ ، وَعَنِ الْأَعْرَجِ يُحَدِّثُونَهُ ، عَنْ أَبِي هُرَيْرَةَ ، أَنّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ : " مَنْ أَدْرَكَ مِنَ الصُّبْحِ رَكْعَةً قَبْلَ أَنْ تَطْلُعَ الشَّمْسُ فَقَدْ أَدْرَكَ الصُّبْحَ ، وَمَنْ أَدْرَكَ رَكْعَةً مِنَ الْعَصْرِ قَبْلَ أَنْ تَغْرُبَ الشَّمْسُ فَقَدْ أَدْرَكَ الْعَصْرَ " .
Narrated Abu Huraira: Allah's Apostle said, "Whoever could get one rak`a (of the Fajr prayer) before sunrise, he has got the (morning) prayer and whoever could get one rak`a of the `Asr prayer before sunset, he has got the (`Asr) prayer."
Hadith Reference Sahih Bukhari / The Book of The Times of As-Salat (The Prayers) and Its Superiority / Hadith: 579
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة