Sunan an Nasai
The Book of the Times (of Prayer)
Hadith #12
6.12
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم صَلَّى صَلاَةَ الْعَصْرِ وَالشَّمْسُ فِي حُجْرَتِهَا لَمْ يَظْهَرِ الْفَىْءُ مِنْ حُجْرَتِهَا .
It was narrated from 'Aishah that the Messenger of Allah (ﷺ) prayed 'Asr when the sun was in her room and the shadow had not appeared on her wall