Sahih al-Bukhari 261
Sahih al-Bukhari · Book 5: Bathing (Ghusl) · Can a Junub (a person who has yet to take bath after the sexual act or wet dream) put his hands in a pot (containing water) before washing them if they are not polluted with a dirty thing except Janaba?
Narrated Aisha:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ ، أَخْبَرَنَا أَفْلَحُ ، عَنِ الْقَاسِمِ ، عَنْ عَائِشَةَ ، قَالَتْ كُنْتُ أَغْتَسِلُ أَنَا وَالنَّبِيُّ، صلى الله عليه وسلم مِنْ إِنَاءٍ وَاحِدٍ تَخْتَلِفُ أَيْدِينَا فِيهِ.
The Prophet (ﷺ) and I used to take a bath from a single pot of water and our hands used to go in the pot after each other in turn.