The Messenger of Allah ﷺ said, "Water is from water."
حدثنا محمد بن الصباح حدثنا سفيان بن عيينة عن عمرو بن دينار عن ابن السائب عن عبد الرحمن بن سعاد
قال رسول الله ﷺ الماء من الماء
No references are available.
[sahih] Nasai narrated it: 1/115, Purification, chapter on one who has a wet dream but does not see any fluid, no. 199, from the hadith of Sufyan, through this chain, and it has corroborating narrations in Muslim, no. 343, and others.