Sunan Ibn Majah · Hadith 655
The Book of Purification and its Sunnah - كتاب الطهارة وسننها
حدثنا أبو بكر بن أبي شيبة، حدثنا حماد بن خالد، عن العمري، عن عبيد الله، عن القاسم، عن عائشة، عن النبي صلى الله عليه وسلم قال " إذا استيقظ أحدكم من نومه فرأى بللا ولم ير أنه احتلم اغتسل وإذا رأى أنه قد احتلم ولم ير بللا فلا غسل عليه " .
It was narrated from 'Aishah that: The Prophet said: "If anyone of wakes up and sees some wetness, but he does not think that he had an erotic dream, let him have a bath. But if he thinks that he had an erotic dream but he does not see any wetness, then he does not have to take a bath."
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).