مشكوة المصابيح
Mishkat al-Masabih
كتاب الطهارة
The Book of Purification
(مَنْ رَأَى الجِمَاعَ فِي المَنَامِ وَلَمْ يَنْزِلْ فَلَا غُسْلَ عَلَيْهِ)
(If One Sees Intercourse in a Dream but Does Not Ejaculate, Ghusl is Not Obligatory)
Hadith 432
وَقَالَ ابْنُ عَبَّاسٍ: إِنَّمَا الْمَاءُ مِنَ الْمَاءِ فِي الِاحْتِلَامِ. رَوَاهُ التِّرْمِذِيُّ وَلَمْ أَجِدْهُ فِي الصَّحِيحَيْنِ
Ibn ‘Abbas said that "Water is necessary only when there is an emission” applies to a dream. Tirmidhi transmitted it, but I have not found it in the two Sahihs.
