The Book of Purification
1/132. Chapter:
The Ghusl Of A Woman Who Sees Something In Her dream Like A Man Sees
Sunan an-Nasai
أَخْبَرَنَا عَبْدُ الْجَبَّارِ بْنُ الْعَلاَءِ، عَنْ سُفْيَانَ، عَنْ عَمْرٍو، عَنْ عَبْدِ الرَّحْمَنِ بْنِ السَّائِبِ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ سُعَادٍ، عَنْ أَبِي أَيُّوبَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْمَاءُ مِنَ الْمَاءِ " .
It was narrated from Abu Ayyub that the Prophet (ﷺ) said: "Water is for Water." [1] [1] That is, water for peforming Ghusl is obligatory when the ejaculation of water (semen) occurs.
Reference : Sunan an-Nasa'i 199In-book reference : Book 1, Hadith 200English translation : Vol. 1, Book 1, Hadith 199