Abu Dawud
Purification (Kitab Al-Taharah)
Book Number: 001 / Hadith Number: 342
Narated By Hafsah, Ummul Mu'minin : The Prophet (pbuh) said: It is necessary for every adult (person) to go for (saying) Friday (prayer), and for everyone who goes for Friday (prayer) washing is necessary.
Abu Dawud said: If one takes a bath after sunrise, even though he washes because of seminal emission, that would be enough for him for his washing on Friday.