Sunan an-Nasa'i 573
سنن النسائي#573Sahihأَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ هِلاَلِ بْنِ يِسَافٍ، عَنْ وَهْبِ بْنِ الأَجْدَعِ، عَنْ عَلِيٍّ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنِ الصَّلاَةِ بَعْدَ الْعَصْرِ إِلاَّ أَنْ تَكُونَ الشَّمْسُ بَيْضَاءَ نَقِيَّةً مُرْتَفِعَةً .
It was narrated that 'Ali said:"The Messenger of Allah (ﷺ)forbade praying after 'Asr unless the sun was still white, clear and high
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiIsnaad Sahih
In-book reference: 6:80