كتاب القرآن
15  
The Qur'an

Yahya related to me from Malik from Muhammad ibn Yahya ibn Habban from al Araj from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, forbade prayer after asr until the sun had set, and prayer after subh until the sun had risen.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ يَحْيَى بْنِ حَبَّانَ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنِ الصَّلاَةِ بَعْدَ الْعَصْرِ حَتَّى تَغْرُبَ الشَّمْسُ وَعَنِ الصَّلاَةِ بَعْدَ الصُّبْحِ حَتَّى تَطْلُعَ الشَّمْسُ ‏.‏
Sunnah.com reference : Book 15, Hadith 50
USC-MSA web (English) reference : Book 15, Hadith 48
Arabic reference : Book 15, Hadith 520