Hadithcore
Bulugh al-Maram, 123

Narrated `A'ishah (RAA):

I and Allah's Messenger (Peace be upon him) took a Ghusl (bath) due to sexual impurity from the same vessel and our hands alternated into it. [Agreed upon.] Ibn Hibban added "and (our hands) met."

وَعَنْهَا قَالَتْ: { كُنْتُ أَغْتَسِلُ أَنَا وَرَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-مِنْ إِنَاءٍ وَاحِدٍ, تَخْتَلِفُ أَيْدِينَا فِيهِ مِنَ اَلْجَنَابَةِ } مُتَّفَقٌ عَلَيْه ِ [1]‏ .‏ زَادَ اِبْنُ حِبَّانَ: وَتَلْتَقِ ي [2]‏ .‏

References2 variants
In-Book Reference
Book 1, Hadith 150
English Reference
Book 1, Hadith 133