صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الأوقات التى ينهى عن صلاة التطوع فيهنChapters on Times when Voluntary Prayers are Prohibited
(578) بَابُ ذِكْرِ الْخَبَرِ الْمُفَسِّرِ لِبَعْضِ اللَّفْظَةِ الْمُجْمَلَةِ الَّتِي ذَكَرْتُهَاThe chapter explaining some of the general phrase mentioned
Hadith Q1284
وَالدَّلِيلِ عَلَى أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّمَا نَهَى عَنِ الصَّلَاةِ بَعْدَ الْعَصْرِ حَتَّى تَغْرُبَ الشَّمْسُ إِذَا كَانَتِ الشَّمْسُ غَيْرَ مُرْتَفِعَةٍ، فَدَانَتْ لِلْغُرُوبِ
And the evidence for the fact that the Noble Prophet (peace be upon him) forbade performing voluntary prayers after ‘Asr until sunset is that this prohibition applies when the sun is not high and is near to setting.
