كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 152
Narrated Buraidah (RA) in another version of the above Hadith regarding 'Asr (afternoon prayer):
"When the sun is white and clear." [Reported by Muslim].
وَلَهُ مِنْ حَدِيثِ بُرَيْدَةَ فِي اَلْعَصْرِ: { وَالشَّمْسُ بَيْضَاءُ نَقِيَّةٌ } 1‏ .‏
Reference : Bulugh al-Maram 152
In-book reference : Book 2, Hadith 152
English translation : Book 2, Hadith 152
Hadith Text
Reference